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. Zool.
One of the lateral pieces next to the sternum in the thorax of insects.
© Webster 1913.