\O*don"toid\, a. [Gr. ?; 'odoy`s, 'odo`ntos, a tooth +
? form: cf.F. odonto["i]de.] (Anat.)
(a) Having the form of a tooth; toothlike.
(b) Of or pertaining to the odontoid bone or to the odontoid
    process.
{Odontoid bone} (Anat.), a separate bone, in many reptiles,
   corresponding to the odontoid process.
{Odontoid process}, or {Odontoid peg} (Anat.), the anterior
   process of the centrum of the second vertebra, or axis, in
   birds and mammals. See {Axis}.