E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
The cornucopia or horn of plenty. The infant Zeus was fed with goats milk by Amaltha, one of the daughters of Melisseus, King of Crete. Zeus, in gratitude, broke off one of the goats horns, and gave it to Amaltha, promising that the possessor should always have in abundance everything desired. (See ÆGIS.)