lacrimator

from WordNet (r) 3.0 (2006)

lacrimator
    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}]

from The Collaborative International Dictionary of English v.0.48

lacrimator \lacrimator\ n.
   a chemical substance that causes tears to flow; same as
   {lachrymator}.

   Syn: lachrymator.
        [PJC]

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