O‐don″toid (?), a. [Gr. �; οδοὔσ, οδὄντοσ, a tooth + εἰ̑δοσ form: cf. F. odontoïde.] (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, orOdontoid peg(Anat.), the anterior process of the centrum of the second vertebra, or axis, in birds and mammals. See Axis.