n. A chemical substance that causes tears to flow; same as lacrimator.
Syn. -- lacrimator. [ PJC ]

n.; pl. -ries [ Cf. F. lacrymatoire. ] (Antiq.) A “tear-bottle;” a narrow-necked vessel found in sepulchers of the ancient Romans; -- so called from a former notion that the tears of the deceased person's friends were collected in it. Called also lachrymal or lacrymal. [ 1913 Webster ]

adj. Relating to or inducing tears; -- especially of chemical substances. lacrimator
Syn. -- lacrimatory. [ WordNet 1.5 ]