expletivus

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

explētīvus, a, um, adj. [expleo],

serving to fill out , expletive; in the later grammarians, conjunctiones, such as quidem , equidem , autem , quoque , Don. p. 1763 P.; Charis. p. 199 ib. al.