zo·o·log·i·cal (z???-l?j??-k?l) also zo·o·log·ic (-l?j??k)adj.1. Of or relating to animals or animal life.2. Of or relating to the science of zoology.zo?o·log?i·cal·ly adv.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.zo?o?log?i?cal (?zo? ??l?d? ? k?l) also zo`o?log?ic, adj. 1. of or pertaining to zoology. 2. relating to or concerned with animals. [1800?10] zo`o?log?i?cal?ly, adv. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.