cornucopia

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Greek Mythology The horn of the goat that suckled Zeus, which broke off and became filled with fruit. In folklore, it became full of whatever its owner desired.
• noun A representation of a goat's horn overflowing with fruit, flowers, and grain, signifying prosperity.
• noun A cone-shaped ornament or receptacle.
• noun An overflowing store; an abundance.

from The Century Dictionary.

• noun In classical antiquity, the horn of plenty (which see, under horn).
• noun Hence A horn-shaped or conical vessel or receptacle; especially, such a vessel of paper or other material, filled or to be filled with nuts or sweetmeats.
• noun [capitalized] [NL.] A genus of grasses whose spikes resemble the cornucopia in form.
• noun An extension of the choroid plexus into each lateral recess of the fourth ventricle of the brain.

from the GNU version of the Collaborative International Dictionary of English.

• noun The horn of plenty, from which fruits and flowers are represented as issuing. It is an emblem of abundance.
• noun (Bot.) A genus of grasses bearing spikes of flowers resembling the cornucopia in form.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Greek mythology A goat's horn endlessly overflowing with fruit, flowers and grain; or full of whatever its owner wanted.
• noun A hollow horn- or cone-shaped object, filled with edible or useful things.
• noun An abundance or plentiful supply.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a goat's horn filled with grain and flowers and fruit symbolizing prosperity
• noun the property of being extremely abundant