A culmen is a top, a summit or a culminating point. It may also refer to:
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Culmen (bird)
The beak, bill, or rostrum is an external anatomical structure found mostly in birds, but also in turtles, non-avian dinosaurs and a few mammals. A beak is used for eating, preening, manipulating objects, killing prey, fighting, probing for food ...
, the upper ridge of a bird's beak
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Culmen (cerebellum), a structure in the brain
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