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

Eosaurus \E`o*sau"rus\, n. [NL., fr. Gr. 'hw`s dawn + say^ros
   lizard.] (Paleon.)
   An extinct marine reptile from the coal measures of Nova
   Scotia; -- so named because supposed to be of the earliest
   known reptiles.