Dictionary.com

prothorax

[ proh-thawr-aks, -thohr- ]
/ proʊˈθɔr æks, -ˈθoʊr- /
Save This Word!

noun, plural pro·tho·rax·es, pro·tho·ra·ces [proh-thawr-uh-seez, -thohr-]. /proʊˈθɔr əˌsiz, -ˈθoʊr-/.

the anterior division of the thorax of an insect, bearing the first pair of legs.

QUIZZES

QUIZ YOURSELF ON “ITS” VS. “IT’S”!

Apostrophes can be tricky; prove you know the difference between it’s and its in this crafty quiz!
Question 1 of 12
On the farm, the feed for chicks is significantly different from the roosters’; ______ not even comparable.

Origin of prothorax

From New Latin, dating back to 1820–30; see origin at pro-1, thorax
pro·tho·rac·ic [proh-thaw-ras-ik, -thoh-], /ˌproʊ θɔˈræs ɪk, -θoʊ-/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for prothorax

prothorax
/ (prəʊˈθɔːræks) /

noun plural -thoraxes or -thoraces (-ˈθɔːrəˌsiːz)

the first segment of the thorax of an insect, which bears the first pair of walking legsSee also mesothorax, metathorax
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
Learn A New Word Right Now!