Entomology definition of Trochantine: the basal part of the trochanter when it
is two-jointed: in Coleoptera, a piece often present on the outer
side of and sometimes movable on the coxa; also the small
sclerite connecting the coxa with the sternum in Dytiscidae: in
Neuroptera and Trichoptera the posterior separated part of the
coxa: in Orthoptera, a narrow longitudinal sclerite between
mandible and gena.