culmen cul·men (kŭl'mən)
n. pl. cul·mi·na (kŭk'mə-nə)
The front prominent portion of the monticulus of the vermis of the cerebellum.
Changes in the length of the culmen are indicated in Table 1.
Measurements of taxonomic value include those of the wing, tail, exposed culmen, and depth and the shape of the culmen.
Bill short and stout; culmen arched, and overhanging the mandible.
Red bright as in No. 593d, but black on forehead narrower, usually separated by base of culmen.
culmen, kul′men, n. highest point: the median length-wise ridge of a bird's upper mandible.
Bill long; culmen with sharply defined ridge; toes joined for part of length.
Paler, more rosy, than No. 593; margins to back feathers usually gray; black on forehead usually separated by base of culmen.
Neither depth of bill nor culmen is a practical index to degree of slenderness of bill.
In addition, the depth of the culmen averages two millimeters less in the subspecies in the Marquesas.
These measurements—a culmen of over 26.5 and a wing of 91 mm.