a combining form appearing in loanwords from Greek, where it meant “word,” “speech” (logography); on this model, used in the formation of new compound words (logotype).
Also especially before a vowel, log-.
Origin of logo-
< Greek logo-, combining form of lógos logos
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
indicating word or speechlogogram
Word Origin for logo-
from Greek; 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
before vowels log-, word-forming element meaning "speech, word," from Greek logos "word" (see logos).
Online Etymology Dictionary, © 2010 Douglas Harper
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.