an aquatic shellfish (generally limited to mollusks with calcareous shells such as clams or snails, and excluding crustaceans such as shrimp or crabs)

chief, head, leader

shell, crust, chaff / husk, hull

(malacology) shell length

centimetre

centimetre

cinders, ashes / leftovers

shell

cubic centimeter (US), cubic centimetre (UK) - a unit of volume equal to that of a cube having sides each one centimeter in length, commonly used in fluid measure and for engine sizes. Symbols: cm³ and cc

Babylonia japonica: the Japanese babylon or Japanese ivory shell