\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}.]