noun (plural epimerons or epimera /-ˈmi(ə)rə/)Entomology
(In insects) the posterior part of the sidewall of a thoracic segment.
- Its posterior margin runs at right angles to the longitudinal axis, before swinging inwards to form distinct genal angles and a genal epimeron on the left-hand side.
- Where the posterior margin intercepts the lateral margin on either side, a sharp, posteriorly directed epimeron is formed.
- Together the epimera on each side form a wall that encloses and protects the space ventral to the sternites.
Mid 19th century: from epi- 'near' + Greek mēros 'thigh'.
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