- the anterior division of the thorax of an insect, bearing the first pair of legs.
Origin of prothorax
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Examples from the Web for prothorax
Umbones: two movable spines on the sides of prothorax in some Coleoptera.Explanation of Terms Used in Entomology
John. B. Smith
We are next to say something upon the shape of the prothorax.
It consists of an upper and lower part—the prothorax and antepectus.
By the direction of the head, I mean its inclination with respect to the prothorax.
The head also is shorter and narrower, and the prothorax has rounded borders.Handbook of Medical Entomology
William Albert Riley
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