Source : Webster's Revised Unabridged Dictionary (1913)

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

Source : WordNet®

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