pro·tho·rax

[proh-thawr-aks, -thohr-]
noun, plural pro·tho·rax·es, pro·tho·ra·ces [-thawr-uh-seez, -thohr-] .
the anterior division of the thorax of an insect, bearing the first pair of legs.

Origin:
1820–30; < Neo-Latin; see pro-1, thorax

pro·tho·rac·ic [proh-thaw-ras-ik, -thoh-] , adjective
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World English Dictionary
prothorax (prəʊˈθɔːræks) [Click for IPA pronunciation guide]
 
n , pl -thoraxes, -thoraces
mesothorax See also metathorax the first segment of the thorax of an insect, which bears the first pair of walking legs

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Prothorax is always a great word to know.
So is ninnyhammer. Does it mean:
a stew of meat, vegetables, potatoes, etc.
a fool or simpleton; ninny.
Example sentences
It is a long-horned beetle and has two prominent bumps on the prothorax.
The head is usually concealed from above by the prothorax.
The prothorax is enlarged, with the mesothorax and metathorax more narrow.
It is important to mention that the flea beetle prothorax lacks visible pleura.
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