zo·o·gen·ic (z???-j?n??k) also zo·og·e·nous (z?-?j??-n?s)adj. Originating in or produced by animals.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.