• synonyms


[proh-stur-nuh m]
noun, plural pro·ster·na [proh-stur-nuh] /proʊˈstɜr nə/, pro·ster·nums.
  1. the ventral sclerite of the prothorax of an insect.
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Origin of prosternum

From New Latin, dating back to 1820–30; see origin at pro-1, sternum
Related formspro·ster·nal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for prosternum

Historical Examples

  • Prosternum: the fore-breast: the sclerite between the fore-legs.

    Explanation of Terms Used in Entomology

    John. B. Smith

  • Prosternum with stridulatory sulcus (notch for beak); with three segments, short, strong.

    Handbook of Medical Entomology

    William Albert Riley

British Dictionary definitions for prosternum


noun plural -na (-nə) or -nums
  1. the sternum of the prothorax of an insect
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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