资料来源 : Webster's Revised Unabridged Dictionary (1913)

Eventognathi \Ev`en*tog"na*thi\, n. pl. [NL., fr. Dr. ? well + ?
   within ? the jaw.] (Zo["o]l.)
   An order of fishes including a vast number of freshwater
   species such as the carp, loach, chub, etc.