The Collaborative International Dictionary of English v.0.48:

Lachrymation \Lach`ry*ma"tion\, n. [L. lacrimatio, from
   lacrimare to shed tears, fr. lacrima tear.]
   The act of shedding tears; weeping.
   [1913 Webster]

WordNet (r) 3.0 (2006):

lachrymation
    n 1: shedding tears [syn: lacrimation, lachrymation,
         tearing, watering]