n. 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.n. 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.n. 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.