episternum
上胸骨; 前側片
Ep·i·ster·num n.; pl. Episterna
1. Anat. (a) A median bone connected with the sternum, in many vertebrates; the interclavicle. (b) Same as Epiplastron.
2. Zoöl. One of the lateral pieces next to the sternum in the thorax of insects.
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