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<?xml version="1.0" encoding="windows-1252"?> |
<!-- XBRL Document Created with Wdesk from Workiva --> |
<!-- Copyright 2020 Workiva --> |
<!-- r:8b1d3bee-9ef7-4258-8c23-b1ce303aa1e0,g:762ec66f-c5b3-4d76-8d5f-f0255edc4891 --> |
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| <link:definitionLink xlink:role="http://www.cabotcmp.com/role/Cover" xlink:type="extended" id="id0631ea8079a446a993ae74a0c48dd49_9cc4ad51-dbab-4c48-9564-737752d1fd4c"/> |
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