Lewis & Short

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.