Source : Webster's Revised Unabridged Dictionary (1913)

Paludina \Pal`u*di"na\, n.; pl. L. {Paludin[ae]}, E.
   {Paludinas}. [NL., fr. L. palus, -udis, a marsh, pool.]
   (Zo["o]l.)
   Any one of numerous species of freshwater pectinibranchiate
   mollusks, belonging to {Paludina}, {Melantho}, and allied
   genera. They have an operculated shell which is usually
   green, often with brown bands. See Illust. of {Pond snail},
   under {Pond}.