The Collaborative International Dictionary of English v.0.48:

Eroticism \E*rot"i*cism\, n.
   Erotic quality.
   [1913 Webster]

WordNet (r) 3.0 (2006):

eroticism
    n 1: a state of anticipation of sexuality [syn: eroticism,
         erotism]
    2: the arousal of feelings of sexual desire [syn: amorousness,
       eroticism, erotism, sexiness, amativeness]

Moby Thesaurus II by Grady Ward, 1.0:

58 Moby Thesaurus words for "eroticism":
   andromania, animality, aphrodisia, bawdiness, biological urge,
   bodily appetite, carnal desire, carnality, clitoromania,
   concupiscence, desire, dirtiness, eromania, eroticomania,
   eroticomaniac, erotism, erotomania, fleshliness, fleshly lust,
   furor uterinus, goatishness, gynecomania, horniness, hot blood,
   hot pants, hysteromania, indecency, infantile sexuality, itch,
   lasciviousness, lecherousness, lechery, lewdness, libidinousness,
   lickerishness, lubriciousness, lubricity, lust, lustfulness,
   nymphomania, obscenity, passion, polymorphous perversity,
   prurience, pruriency, randiness, salaciousness, salacity,
   satyriasis, satyrism, sensuality, sexiness, sexual desire,
   sexual longing, sexual passion, sexuality, uteromania,
   venereal appetite