noun
also otter-shell clam or otter's shell
: any of several bivalve mollusks of the genus Lutraria that resemble those of the genus Mya but have shells which are more porcelaneous
noun
also otter-shell clam or otter's shell
: any of several bivalve mollusks of the genus Lutraria that resemble those of the genus Mya but have shells which are more porcelaneous
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012