giant clam
noun
1- a very large bivalve mollusc that occurs in the tropical Indo-Pacific大砗蛤, 巨蛤。
1.1
- Family Tridacnidae: several species, including Tridacna gigas, which is the largest living shelled mollusc.砗磲科, 数种, 包括大砗磲, 拉丁名为Tridacna gigas,是现存最大有壳软体动物。