The Collaborative International Dictionary of English v.0.48:

Sapphic \Sap"phic\, a. [L. Sapphicus, Gr. ?, fr. ? Sappho.]
   1. Of or pertaining to Sappho, the Grecian poetess; as,
      Sapphic odes; Sapphic verse.
      [1913 Webster]

   2. (Pros.) Belonging to, or in the manner of, Sappho; -- said
      of a certain kind of verse reputed to have been invented
      by Sappho, consisting of five feet, of which the first,
      fourth, and fifth are trochees, the second is a spondee,
      and the third a dactyl.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sapphic \Sap"phic\, n. (Pros.)
   A Sapphic verse.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Sapphic
    adj 1: a meter used by Sappho and named after her
    2: of or relating to or characterized by homosexual relations
       between woman [syn: lesbian, sapphic]

Moby Thesaurus II by Grady Ward, 1.0:

46 Moby Thesaurus words for "sapphic":
   AC-DC, Alcaic, Anacreontic, Castalian, Homeric, Hudibrastic,
   Pierian, Pindaric, Theocritean, amphierotic, autoerotic, bardic,
   bisexed, bisexual, bucolic, butch, deviant, didactic, dithyrambic,
   dramatic, eclogic, effeminate, elegiac, epic, gay, heroic,
   homoerotic, homosexual, idyllic, lesbian, mannish, mock-heroic,
   narrative, pastoral, perverted, poetic, poetico-mystical,
   poetico-mythological, poetico-philosophic, poetlike, queer,
   rhapsodic, runic, skaldic, transvestite, tribadistic