noun pro·tho·rax \(ˌ)prō-ˈthȯr-ˌaks\

Definition of prothorax

  1. :  the anterior segment of the thorax of an insect — see insect illustration

Origin and Etymology of prothorax

New Latin prothorac-, prothorax, from 1pro- + thorax

First Known Use: 1826

Learn More about prothorax

Seen and Heard

What made you want to look up prothorax? Please tell us where you read or heard it (including the quote, if possible).