The triglyceride of the straight-chain isomer of butyric acid, C15H26O6, naturally present in butter and used as a flavoring and plasticizer. Also called butyrin.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.