pectusculum

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

pectuscŭlum, i, n. dim. [pectus],

a little breast (late Lat.), Hier. Ep. 22, n. 30: pectus, pectusculum, Not. Tir. p. 58; Vulg. Exod. 29, 26; id. Num. 6, 20.