from the GNU version of the Collaborative International Dictionary of English
- n. 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.
from The Century Dictionary and Cyclopedia
- n. A genus of inequilateral equivalve bivalve mollusks, forming the type of the family Tridacnidæ.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. type genus of the family Tridacnidae: giant clams
Sorry, no etymologies found.