Definition of episternum
1a : interclavicle b : any of several other sternal elements of similar origin or position (such as the presternum of a mammal or the epiplastron of a turtle)
2 : a lateral division or piece of a somite of an arthropod; specifically : the anterior sclerite of the pleuron of an insect — compare epimeron
3 : manubrium 1a
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Origin and Etymology of episternum
New Latin, from epi- + sternum
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