Source : Webster's Revised Unabridged Dictionary (1913)

Lunate \Lu"nate\, Lunated \Lu"na*ted\, a. [L. lunatus
   crescent-shaped, p. p. of lunare to bend like a crescent, fr.
   luna the moon.]
   Crescent-shaped; as, a lunate leaf; a lunate beak; a lunated
   cross. --Gray.

Source : WordNet®

lunate
     adj : resembling the new moon in shape [syn: {crescent(a)}, {crescent-shaped},
            {semilunar}]