1. a gas that makes the eyes fill with tears but does not damage them; used in dispersing crowds; [syn: tear gas, teargas, lacrimator, lachrymator]
WordNet (r) 3.0 (2006):
tear gas
n 1: a gas that makes the eyes fill with tears but does not
damage them; used in dispersing crowds [syn: tear gas,
teargas, lacrimator, lachrymator]