Source : Webster's Revised Unabridged Dictionary (1913)

Lim naea \Lim *n[ae]"a\ (l[i^]m*n[=e]"[.a]), n. [NL., fr. Gr.
   limnai^os pertaining to a marsh, fr. li`mh a marsh.]
   (Zo["o]l.)
   A genus of fresh-water air-breathing mollusks, abundant in
   ponds and streams; -- called also {pond snail}. [Written also
   {Lymn[ae]a}.]