a combining form meaning “joint,” “jointed,” used in the formation of compound words: arthropod.
Also especially before a vowel, arthr-.
Origin of arthro-
< Greek, combining form of árthron a joint; akin to Latin artus (see article)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
before a vowel arthr-
indicating a jointarthritis; arthropod
Word Origin for arthro-
from Greek arthron
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-forming element meaning "pertaining to the joints," from Greek arthro- (before vowels arth-), comb. form of arthron "joint," from PIE *ar-dhro-, from *ar- "to fit together;" see arm (n.1).
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.