Culmen
Pronunciation : Cul"men (kl"mn)
Part of Speech : n.
Etymology : [L., fr. cellere (in comp.) to impel; cf. celsus pushed upward, lofty.]
Definition : 1. Top; summit; acme. R. North.
2. (Zo?l.)
Defn: The dorsal ridge of a bird's bill.
Source : Webster's Unabridged Dictionary, 1913