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<!-- DFS ActiveDisclosure(SM) XBRL Linkbase Document - http://www.dfsco.com/financial-services/ --> |
<!-- Creation Date : 2019-03-08T00:54:55.1391909+00:00 --> |
<!-- Version : 3.3.6989.14284 --> |
<!-- Package ID : 73f4c1ebeb56471eb3f7fdeb49794fee --> |
<!-- Copyright (c) 2019 Donnelley Financial, LLC. All Rights Reserved. --> |
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| <definitionLink xlink:type="extended" xlink:role="http://www.biolase.com/20181231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"> |
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| | <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CumulativeEffectOnRetainedEarningsTax1" xlink:type="locator" xlink:label="us-gaap_CumulativeEffectOnRetainedEarningsTax1"/> |
| | <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued" xlink:type="locator" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued"/> |
| | <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:type="locator" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/> |
| | <loc xlink:href="biol-20181231.xsd#biol_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsForfeitureRate" xlink:type="locator" xlink:label="biol_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsForfeitureRate"/> |
| | <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:type="locator" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/> |
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| | <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:type="locator" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense"/> |
| | <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdvertisingExpense" xlink:type="locator" xlink:label="us-gaap_AdvertisingExpense"/> |
| | <loc xlink:href="biol-20181231.xsd#biol_ProductWarrantTerm" xlink:type="locator" xlink:label="biol_ProductWarrantTerm"/> |
| | <loc xlink:href="biol-20181231.xsd#biol_ContractWithCustomerLiabilityRevenueRecognizedDeferredRoyalties" xlink:type="locator" xlink:label="biol_ContractWithCustomerLiabilityRevenueRecognizedDeferredRoyalties"/> |
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| | <loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:type="locator" xlink:label="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis"/> |
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| | <loc xlink:href="biol-20181231.xsd#biol_CommercialCreditCardMember" xlink:type="locator" xlink:label="biol_CommercialCreditCardMember"/> |
| | <loc xlink:href="biol-20181231.xsd#biol_CorporateCreditCardsMember" xlink:type="locator" xlink:label="biol_CorporateCreditCardsMember"/> |
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| | <loc xlink:href="biol-20181231.xsd#biol_AccountingPoliciesTable" xlink:type="locator" xlink:label="biol_AccountingPoliciesTable"/> |
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