Lewis Short
praesegmen (noun N) : praeseco
* A piece cut off, a paring (ante- and postclass.): tonsor omnia abstulit praesegmina,Plaut. Aul. 2, 4, 33; cf.: praesegmina proprie Plautus in Aululariā ea dici voluit, quae unguibus eminulis praesecantur,Non. 151, 33: cadaverum,App. M. 2, p. 123, 24.
Charlton T. Lewis, Charles Short, A Latin Dictionary