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early 14c., from Old French creste "tuft, comb" (Modern French crête), from Latin crista "tuft, plume," perhaps related to word for "hair" (e.g. crinis), but it also was used for crest of a cock or a helmet. Replaced Old English hris.
late 14c., "provide with a crest," from Old French crester, from creste (see crest (n.)). Meaning "to come over the top of" is from 1832. Related: Crested; cresting.
A projection or ridge, especially of bone; cresta.