ambrosia

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

• noun Greek & Roman Mythology The food of the gods, thought to confer immortality.
• noun Something with an especially delicious flavor or fragrance.
• noun A dessert containing primarily oranges and flaked coconut.

from The Century Dictionary.

• noun The food of certain wood-boring beetles, consisting of various hyphomycetous fungi found associated with the beetles in their galleries, and said by some authors to be propagated by them, each species of beetle using a particular species of fungus.
• noun In Gr. legend, a celestial substance, capable of imparting immortality, commonly represented as the food of the gods, but sometimes as their drink, and also as a richly perfumed unguent; hence, in literature, anything comparable in character to either of these conceptions.
• noun A genus of widely distributed coarse annual weeds, of the natural order Compositæ, chiefly American, and generally known as ragweed. A. artemisiæfolia is also called Roman wormwood or hogweed.

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

• noun The fabled food of the gods (as nectar was their drink), which conferred immortality upon those who partook of it.
• noun An unguent of the gods.
• noun A perfumed unguent, salve, or draught; something very pleasing to the taste or smell.
• noun Formerly, a kind of fragrant plant; now (Bot.), a genus of plants, including some coarse and worthless weeds, called ragweed, hogweed, etc.
• noun (Zoöl.) The food of certain small bark beetles, family Scolytidæ believed to be fungi cultivated by the beetles in their burrows.
• noun A dessert made from shredded coconuts and oranges, sometimes including other ingredients such as marshmallow.

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

• noun Greek mythology, Roman mythology The food of the gods, thought to confer immortality.
• noun Any food with an especially delicious flavour or fragrance.
• noun A mixture of nectar and pollen prepared by worker bees and fed to larvae.

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

• noun any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma
• noun (classical mythology) the food and drink of the gods; mortals who ate it became immortal
• noun fruit dessert made of oranges and bananas with shredded coconut
• noun a mixture of nectar and pollen prepared by worker bees and fed to larvae