[proh-stur-nuh m]

noun, plural pro·ster·na [proh-stur-nuh] /proʊˈstɜr nə/, pro·ster·nums.

the ventral sclerite of the prothorax of an insect.

Origin of prosternum

From New Latin, dating back to 1820–30; see origin at pro-1, sternum
Related formspro·ster·nal, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for prosternum

Historical Examples of prosternum

British Dictionary definitions for prosternum


noun plural -na (-nə) or -nums

the sternum of the prothorax of an insect
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