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<!-- Generated by DFIN XBRL Schema Document - http://www.dfinsolutions.com/ - on 22-06-2026 07:16:12 PM -->
<!-- Copyright(c) 2026 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
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				<link:loc xlink:type="locator" xlink:href="#bet_DebtSecuritiesRiskMember" xlink:label="DebtSecuritiesRiskMember"/>
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			<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/ProspectusOnly">
				<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain" xlink:label="DocumentDomain"/>
				
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			<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/CoregistrantOnly">           
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				<link:label xlink:type="resource" xlink:label="label_S000085056Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">iShares Enhanced Short-Term Bond Active ETF</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000085056Member" xlink:to="label_S000085056Member"/>
				<link:label xlink:type="resource" xlink:label="label_S000085056Member_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">S000085056 [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="S000085056Member" xlink:to="label_S000085056Member_2"/>
				<link:loc xlink:type="locator" xlink:href="#bet_BloombergGlobalAggregateBondIndexMember" xlink:label="BloombergGlobalAggregateBondIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_BloombergGlobalAggregateBondIndexMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">Bloomberg Global Aggregate Bond Index (Index returns do not reflect deductions for fees, expenses or taxes)</link:label>
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				<link:label xlink:type="resource" xlink:label="label_BloombergGlobalAggregateBondIndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Bloomberg Global Aggregate Bond Index [Member]</link:label>
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				<link:loc xlink:type="locator" xlink:href="#bet_ICEBofA3MonthUSTreasuryBillIndexMember" xlink:label="ICEBofA3MonthUSTreasuryBillIndexMember"/>
				<link:label xlink:type="resource" xlink:label="label_ICEBofA3MonthUSTreasuryBillIndexMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">ICE BofA 3-Month U.S. Treasury Bill Index (Index returns do not reflect deductions for fees, expenses or taxes)</link:label>
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				<link:label xlink:type="resource" xlink:label="label_ICEBofA3MonthUSTreasuryBillIndexMember_2" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">ICE BofA 3 Month U S Treasury Bill Index [Member]</link:label>
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				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000249919Member" xlink:to="label_C000249919Member_2"/>
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				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DerivativesRisksMember" xlink:to="label_DerivativesRisksMember"/>
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				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EquitySecuritiesRiskMember" xlink:to="label_EquitySecuritiesRiskMember"/>
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				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="IssuerRiskMember" xlink:to="label_IssuerRiskMember"/>
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				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AuthorizedParticipantConcentrationRiskMember" xlink:to="label_AuthorizedParticipantConcentrationRiskMember"/>
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				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CashTransactionsRiskMember" xlink:to="label_CashTransactionsRiskMember"/>
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				<link:label xlink:type="resource" xlink:label="label_ConvertibleSecuritiesRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Convertible Securities Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ConvertibleSecuritiesRiskMember" xlink:to="label_ConvertibleSecuritiesRiskMember"/>
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				<link:label xlink:type="resource" xlink:label="label_DepositaryReceiptsRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Depositary Receipts Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DepositaryReceiptsRiskMember" xlink:to="label_DepositaryReceiptsRiskMember"/>
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				<link:label xlink:type="resource" xlink:label="label_ForeignSecuritiesRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Foreign Securities Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ForeignSecuritiesRiskMember" xlink:to="label_ForeignSecuritiesRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#bet_IlliquidInvestmentsRiskMember" xlink:label="IlliquidInvestmentsRiskMember"/>
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				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="IlliquidInvestmentsRiskMember" xlink:to="label_IlliquidInvestmentsRiskMember"/>
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				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LargeShareholderAndLargeScaleRedemptionRiskMember" xlink:to="label_LargeShareholderAndLargeScaleRedemptionRiskMember"/>
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				<link:label xlink:type="resource" xlink:label="label_LeverageRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Leverage Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LeverageRiskMember" xlink:to="label_LeverageRiskMember"/>
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				<link:label xlink:type="resource" xlink:label="label_MarketRiskAndSelectionRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Market Risk and Selection Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MarketRiskAndSelectionRiskMember" xlink:to="label_MarketRiskAndSelectionRiskMember"/>
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				<link:label xlink:type="resource" xlink:label="label_MarketTradingRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Market Trading Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MarketTradingRiskMember" xlink:to="label_MarketTradingRiskMember"/>
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				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NotAMoneyMarketFundRiskMember" xlink:to="label_NotAMoneyMarketFundRiskMember"/>
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				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperationalAndTechnologyRisksMember" xlink:to="label_OperationalAndTechnologyRisksMember"/>
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				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PreferredSecuritiesRiskMember" xlink:to="label_PreferredSecuritiesRiskMember"/>
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				<link:label xlink:type="resource" xlink:label="label_RepurchaseAgreementsRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Repurchase Agreements Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RepurchaseAgreementsRiskMember" xlink:to="label_RepurchaseAgreementsRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#bet_ReverseRepurchaseAgreementsRiskMember" xlink:label="ReverseRepurchaseAgreementsRiskMember"/>
				<link:label xlink:type="resource" xlink:label="label_ReverseRepurchaseAgreementsRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Reverse Repurchase Agreements Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ReverseRepurchaseAgreementsRiskMember" xlink:to="label_ReverseRepurchaseAgreementsRiskMember"/>
				<link:loc xlink:type="locator" xlink:href="#bet_RiskOfInvestingInTheUnitedStatesMember" xlink:label="RiskOfInvestingInTheUnitedStatesMember"/>
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				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RiskOfInvestingInTheUnitedStatesMember" xlink:to="label_RiskOfInvestingInTheUnitedStatesMember"/>
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				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SmallAndMidCapitalizationCompanyRiskMember" xlink:to="label_SmallAndMidCapitalizationCompanyRiskMember"/>
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				<link:label xlink:type="resource" xlink:label="label_USGovernmentIssuerRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">U S Government Issuer Risk [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="USGovernmentIssuerRiskMember" xlink:to="label_USGovernmentIssuerRiskMember"/>
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				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ValuationRiskMember" xlink:to="label_ValuationRiskMember"/>
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				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DebtSecuritiesRiskMember" xlink:to="label_DebtSecuritiesRiskMember"/>
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	<xs:element name="LeverageRiskMember" id="bet_LeverageRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MarketRiskAndSelectionRiskMember" id="bet_MarketRiskAndSelectionRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MarketTradingRiskMember" id="bet_MarketTradingRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="NotAMoneyMarketFundRiskMember" id="bet_NotAMoneyMarketFundRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="OperationalAndTechnologyRisksMember" id="bet_OperationalAndTechnologyRisksMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="PreferredSecuritiesRiskMember" id="bet_PreferredSecuritiesRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="RepurchaseAgreementsRiskMember" id="bet_RepurchaseAgreementsRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="ReverseRepurchaseAgreementsRiskMember" id="bet_ReverseRepurchaseAgreementsRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="RiskOfInvestingInTheUnitedStatesMember" id="bet_RiskOfInvestingInTheUnitedStatesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="SmallAndMidCapitalizationCompanyRiskMember" id="bet_SmallAndMidCapitalizationCompanyRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="TaxRiskMember" id="bet_TaxRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="USGovernmentIssuerRiskMember" id="bet_USGovernmentIssuerRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="ValuationRiskMember" id="bet_ValuationRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="VariableAndFloatingRateInstrumentRiskMember" id="bet_VariableAndFloatingRateInstrumentRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="DebtSecuritiesRiskMember" id="bet_DebtSecuritiesRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>

</xs:schema>
