episterna n.
上胸骨, 胸骨上端(episternum的复数形式)
Episternum \Ep`i*ster"num\, n.; pl. {Episterna}. [NL. See
{Epi-}, and {Sternum}.]
1. (Anat.)
(a) A median bone connected with the sternum, in many
vertebrates; the interclavicle.
(b) Same as {Epiplastron}.
2. (Zo["o]l.) One of the lateral pieces next to the sternum
in the thorax of insects.