Webster’s Revised Unabridged Dictionary · 1913
Cornucopia
Cor′nu·co′pi·a (kôr′nū·kō′pĭ·ȧ), n.; pl. Cornucopias (- ȧz). [L. cornu copiae horn of plenty. See Horn, and Copious.] 1. The horn of plenty, from which fruits and flowers are represented as issuing. It is an emblem of abundance.
2. pl. (Bot.) A genus of grasses bearing spikes of flowers resembling the cornucopia in form.
☞ Some writers maintain that this word should be written, in the singular, cornu copiæ, and in the plural, cornua copiæ.