[L., dim. of urceus pitcher.] (See quots. 1866–86.)
1832. Lindley, Introd. Bot., 104. The true nature of the urceolus.
1845. Encycl. Metrop., XXV. 1006/1. Corolla [of Vahia] urceolate; ovarium girded by an entire urceolus.
1866. Treas. Bot., 1193/2. Urceolus, the two confluent bracts of Carex; any flask-shaped or cup-shaped anomalous organ.
1886. Encycl. Brit., XXI. 4/2. Several genera [of Rotifera] present an external casing or sheath or tube which is termed an ‘urceolus.’ Ibid., 5/1. The urceolus serves as a defence.
