iridescent

from WordNet (r) 3.0 (2006)

iridescent
    adj 1: varying in color when seen in different lights or from
           different angles; "changeable taffeta"; "chatoyant (or
           shot) silk"; "a dragonfly hovered, vibrating and
           iridescent" [syn: {changeable}, {chatoyant},
           {iridescent}, {shot}]
    2: having a play of lustrous rainbow colors; "an iridescent oil
       slick"; "nacreous (or pearlescent) clouds looking like
       mother-of-pearl"; "a milky opalescent (or opaline) luster"
       [syn: {iridescent}, {nacreous}, {opalescent}, {opaline},
       {pearlescent}]

from The Collaborative International Dictionary of English v.0.48

Iridescent \Ir`i*des"cent\ (?; 277), a. [L. iris, iridis, the
   rainbow: cf. F. iridescent.]
   Having colors like the rainbow; exhibiting a play of
   changeable colors; nacreous; prismatic; as, iridescent glass.
   See {iridescence}.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

48 Moby Thesaurus words for "iridescent":
      burele, chatoyant, creamy, delicate, eggshell, flat, gloss, iridal,
      iridial, iridian, irisated, irised, light, mellow, moire,
      mother-of-pearl, nacre, nacred, nacreous, nacry, opalescent,
      opaline, opaloid, pale, pastel, patinaed, pavonian, pavonine,
      pearl-like, pearlish, pearly, quiet, rainbowlike, rainbowy, sad,
      semigloss, simple, sober, soft, soft-colored, soft-hued, softened,
      somber, subdued, subtle, sweet, tender, tortoise-shell