Source : Webster's Revised Unabridged Dictionary (1913)

Ophidion \O*phid"i*on\, n.; pl. {Ophidia}. [L., fr. Gr. ? little
   snake, fr. 'o`fis a serpent.] (Zo["o]l.)
   The typical genus of ophidioid fishes. [Written also
   {Ophidium}.] See Illust. under {Ophidioid}.