Source : Webster's Revised Unabridged Dictionary (1913)

Limacina \Lim`a*ci"na\ (l[i^]m`[.a]*s[imac]"n[.a]), n. [NL.,
   from L. limax, limacis, a slug.] (Zo["o]l.)
   A genus of small spiral pteropods, common in the Arctic and
   Antarctic seas. It contributes to the food of the right
   whales.