What is the origin of cornucopia?
Cornucopia is a Late Latin formation, a combination of the Latin noun phrase cornū cōpiae “horn of plenty.” Cornūcōpia was coined by the late Imperial historian Ammianus Marcellinus (c 325 a.d.-c398 a.d.), a Greek probably born in Syria or Phoenicia who learned his Latin in the army. Cornū comes from the very complicated Proto-Indo-European root ker-, kor-, krā-, kŗ- (and other variants and their extensions) “head, horn.” English horn is a close relation of Latin cornū. Krāníon “skull, cranium” is one of the many Greek derivatives of the root. Cōpia is a derivative of the rare adjective cōpis (or cops) “well supplied, abundant.” Cornūcōpia entered English in the 16th century.