The Collaborative International Dictionary of English v.0.48:

Lachrymatory \Lach"ry*ma*to*ry\, 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]

The Collaborative International Dictionary of English v.0.48:

lachrymatory \lachrymatory\ adj.
   Relating to or inducing tears; -- especially of chemical
   substances. lacrimator

   Syn: lacrimatory.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

lachrymatory
    adj 1: relating to or prompting tears [syn: lacrimatory,
           lachrymatory]