The Collaborative International Dictionary of English v.0.48:
Ampul \Am"pul\, n. [AS. ampella, ampolla, L. ampulla: cf. OF. ampolle, F. ampoule.] 1. Same as Ampulla, 2. [1913 Webster] 2. same as ampule. [PJC]WordNet (r) 3.0 (2006):
ampul n 1: a small bottle that contains a drug (especially a sealed sterile container for injection by needle) [syn: phial, vial, ampule, ampul, ampoule]