episternum: the anterior and larger lateral thoracic sclerite between the sternum and notum.
This plate is called the episternum, and its stalk the omosternum.
In IIIa, the episternum (a) and epimeron (b) are slightly separated.
episternum, ep-i-ster′num, n. the interclavicle: the epiplastron: the presternum of mammals.
In Man and in the Mole the paired nature of the episternum is clearly apparent.
The episternum (fig. 30, A, 10) is a thin almost circular plate of cartilage much of which remains hyaline.
episternum ep·i·ster·num (ěp'ĭ-stûr'nəm)
The broad upper segment of the sternum occasionally fused with the body of the sternum and forming the sternal angle. Also called manubrium, presternum.