Search Result for "mother-of-pearl": 
Wordnet 3.0

NOUN (1)

1. the iridescent internal layer of a mollusk shell;
[syn: mother-of-pearl, nacre]



The Collaborative International Dictionary of English v.0.48:

Mother-of-pearl \Moth"er-of-pearl`\, n. (Zool.)
   The hard, iridescent, pearly internal layer of several kinds
   of shells, esp. of pearl oysters, river mussels, and the
   abalone shells; nacre. See Pearl.
   [1913 Webster]


WordNet (r) 3.0 (2006):

mother-of-pearl
    n 1: the iridescent internal layer of a mollusk shell [syn:
         mother-of-pearl, nacre]