Source : Webster's Revised Unabridged Dictionary (1913)

Aphrodisiac \Aph`ro*dis"i*ac\, Aphrodisiacal
\Aph`ro*di*si"a*cal\, a. [Gr. ? pertaining to sensual love, fr.
   ?. See {Aphrodite}.]
   Exciting venereal desire; provocative to venery.

Aphrodisiac \Aph`ro*dis"i*ac\, n.
   That which (as a drug, or some kinds of food) excites to
   venery.

Source : WordNet®

aphrodisiac
     adj : exciting sexual desire [syn: {aphrodisiacal}, {sexy}] [ant:
           {anaphrodisiac}]

aphrodisiac
     n : a drug or other agent that stimulates sexual desire