a combining form used in the names of sciences or bodies of knowledge: paleontology; theology.
a termination of nouns referring to writing, discourses, collections, etc.: trilogy; martyrology.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for -logy
n combining form
indicating the science or study ofmusicology
indicating writing, discourse, or body of writingstrilogy; phraseology; martyrology
Derived Forms-logical or -logic, adj combining form-logist, n combining form
Word Origin for -logy
from Latin -logia, from Greek, from logos word; see logos
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Medicine definitions for -logy
Science; theory; study:dermatology.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.