[ noun ]
a strong sexual desire
<noun.feeling>

Lecherous \Lech"er*ous\, a.
Like a lecher; addicted to lewdness; excessively lustful; --
used mostly of men; also, lust-provoking. ``A lecherous thing
is wine.'' --Chaucer. -- {Lech"er*ous*ly}, adv. --
{Lech"er*ous*ness}, n.

lecherousness \lech"er*ous*ness\ n.
an inclination to excessive indulgence in sexual activity;
habitually developing a strong sexual arousal.

Syn: lust, lustfulness, itch.
[WordNet 1.5]