Source : Webster's Revised Unabridged Dictionary (1913)

Minnow \Min"now\, n. [OE. menow, cf. AS. myne; also OE. menuse,
   OF. menuise small fish; akin to E. minish, minute.] [Written
   also {minow}.]
   1. (Zo["o]l.) A small European fresh-water cyprinoid fish
      ({Phoxinus l[ae]vis}, formerly {Leuciscus phoxinus});
      sometimes applied also to the young of larger kinds; --
      called also {minim} and {minny}. The name is also applied
      to several allied American species, of the genera
      {Phoxinus}, {Notropis}, or {Minnilus}, and {Rhinichthys}.

   2. (Zo["o]l.) Any of numerous small American cyprinodont
      fishes of the genus {Fundulus}, and related genera. They
      live both in fresh and in salt water. Called also
      {killifish}, {minny}, and {mummichog}.

Source : WordNet®

minnow
     n : very small European freshwater fish common in gravelly
         streams [syn: {Phoxinus phoxinus}]