pīna, ae, f., = πῖνα (less correctly pinna, = πίννα),
the sea-pen , a kind of mussel , Cic. Fin. 3, 19, 63; id. N. D. 2, 48, 123; Plin. 9, 35, 56, § 115; 32, 11, 53, § 150.
pīna ae, f , πῖνα, the sea-pen, spiny mussel. ...
An Elementary Latin Dictionary
·add. ·- A cone of silver amalgam prepared for retorting; also, the residuary cone of spongy silver ...
Webster's Dictionary of the English Language