[1] : The Collaborative International Dictionary of English v.0.48

terpsichore \terpsich"ore\, n. l., fr. gr. ?; ? enjoyment
   fr. ? to gladden + ? dance, dancing. gr. myth.
   the muse who presided over the choral song and the dance,
   especially the latter.
   1913 webster

[2] : WordNet (r) 2.0

terpsichore
     n 1: greek mythology the muse of the dance and of choral song
     2: taking a series of rhythmical steps and movements in time
        to music syn: dancing, dance, saltation
see also:
dancing dance saltation 

[3] : Moby Thesaurus II by Grady Ward, 1.0

31 moby thesaurus words for "terpsichore":
   apollo, apollo musagetes, calliope, clio, erato, euterpe,
   melpomene, orpheus, pierides, polyhymnia, polymnia, thalia,
   artistic imagination, conception, creative imagination,
   creative power, creative thought, esemplastic imagination,
   esemplastic power, genius, inspiration, muse, mythicization,
   mythification, mythopoeia, poetic imagination, sacred nine,
   shaping imagination, the muses, the nine, tuneful nine

Terpsichore >> T Words
Terpsichore, definition of term: Terpsichore
terpsichore_pag1.html