nacreous

from WordNet (r) 3.0 (2006)

nacreous
    adj 1: consisting of or resembling mother-of-pearl
    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

Nacreous \Na"cre*ous\ (n[=a]"kr[-e]*[u^]s), a. [See {Nacre}.]
   (Zool.)
   Consisting of, or resembling, nacre; pearly.
   [1913 Webster] Nad

from Moby Thesaurus II by Grady Ward, 1.0

48 Moby Thesaurus words for "nacreous":
      burele, chatoyant, creamy, delicate, eggshell, flat, gloss, iridal,
      iridescent, iridial, iridian, irisated, irised, light, mellow,
      moire, mother-of-pearl, nacre, nacred, 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

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