Tridacna

2 definitions found

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

  Tridacna \Tri*dac"na\, n. [L., pl., a kind of oysters, fr. Gr. ?
     eaten at three bites, ? tri- + ? to bite.] (Zool.)
     A genus of very large marine bivalve shells found on the
     coral reefs of the Indian and Pacific Oceans. One species
     ({Tridacna gigas}) often weighs four or five hundred pounds,
     and is sometimes used for baptismal fonts. Called also {paw


     shell}, and {fountain shell}.
     [1913 Webster] Tridactyl

From WordNet (r) 2.0 [wn]:

  Tridacna
       n : type genus of the family Tridacnidae: giant clams [syn: {genus
           Tridacna}]