Am*bro"sia [L. ambrosia, Gr. mrita, L. mortuus, dead, and to E. mortal.]
1. (Myth.) (a) The fabled food of the gods (as nectar was their drink), which conferred immortality upon those who partook of it. (b) An unguent of the gods. His dewy locks distilled ambrosia. Milton.
2. A perfumed unguent, salve, or draught; something very pleasing to the taste or smell. Spenser.
3. Formerly, a kind of fragrant plant; now (Bot.), a genus of plants, including some coarse and worthless weeds, called ragweed, hogweed, etc.