portiuncula

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

portĭuncŭla, ae, f. dim. [portio],

a small part or portion (post-Aug.). vestis, Plin. 28, 7, 23, § 83: aedium, Dig. 39, 2, 15: domus, ib. 39, 3, 10 pr. : historiae Suetonii, Oros. 6, 7.