Source : Webster's Revised Unabridged Dictionary (1913)

Odontolcae \O`don*tol"cae\, n. pl. [NL., from Gr. 'odoy`s,
   'odo`ntos, a tooth + ? a furrow.] (Paleon.)
   An extinct order of ostrichlike aquatic birds having teeth,
   which are set in a groove in the jaw. It includes
   {Hesperornis}, and allied genera. See {Hesperornis}. [Written
   also {Odontholcae}, and {Odontoholcae}.]

Hesperornis \Hes`pe*ror"nis\, n. [NL., fr. Gr. ? western + ?, ?,
   a bird.] (Paleon.)
   A genus of large, extinct, wingless birds from the Cretaceous
   deposits of Kansas, belonging to the Odontornithes. They had
   teeth, and were essentially carnivorous swimming ostriches.
   Several species are known. See Illust. in Append.