Webster's Revised Unabridged Dictionary · 1913

Cornucopia

Cornucopia (kôr`nu*kō"pi*ȧ) , noun

[Latin 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.
(Botany) 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 copia, and in the plural, cornua copia.