Webster’s Revised Unabridged Dictionary · 1913
Valve-shell
Valve′-shell′ (vălv′shĕl′), n. (Zoöl.) Any fresh-water gastropod of the genus Valvata.
Webster’s Revised Unabridged Dictionary · 1913
Valve′-shell′ (vălv′shĕl′), n. (Zoöl.) Any fresh-water gastropod of the genus Valvata.