[ an-ahr-thruh s ]
/ ænˈɑr θrəs /


Zoology. having no joints or articulated limbs.
(especially in Greek grammar) used without the article.

Origin of anarthrous

First recorded in 1800–10, anarthrous is from the Greek word ánarthros jointless. See an-1, arthr-, -ous

Related forms

an·ar·throus·ly, adverban·ar·throus·ness, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for anarthrous


/ (ænˈɑːθrəs) /


(of a noun) used without an article
having no joints or articulated limbs

Derived Forms

anarthrously, adverbanarthrousness, noun

Word Origin for anarthrous

C19: from Greek anarthros, from an- + arthros joint, definite article
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