a combining form meaning “heat,” “hot,” used in the formation of compound words: thermoplastic.
Origin of thermo-
< Greek, combining form of thermós hot, thérmē heat
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for thermo-
before a vowel therm-
related to, caused by, or measuring heatthermodynamics; thermophile
Word Origin for thermo-
from Greek thermos hot, thermē heat
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
Word Origin and History for thermo-
word-forming element meaning "hot, heat," used in scientific and technical words, from comb. form of Greek thermos "hot," therme "heat" (see thermal).
Online Etymology Dictionary, © 2010 Douglas Harper
Medicine definitions for thermo-
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Science definitions for thermo-
A prefix that means heat, as in thermometer.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.