LAT

Lewis Short

sembella (noun F) : contr. from semi and libella
* A half-libella (a coin): sembella quod libellae dimidium, quod semis assis,Varr. L. L. 5, § 174 Müll.: eandem rationem habere assem ad semissem, quam habet in argento libella ad sembellam,id. ib. 10, § 38 ib.
Charlton T. Lewis, Charles Short, A Latin Dictionary
memory