ientaculum

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

jentācŭlum, i, n. [iento],

a breakfast , taken immediately after rising, by children, valetudinarians, etc. (whereas the prandium was not taken till towards noon): epulas interdum quadrifariam dispertiebat: in jentacula et prandia et cenas comissationesque, Suet. Vit. 13; Mart. 14, 233: me inferre Veneri vovi jam jentaculum, Plaut. Curc. 1, 1, 72.