a. [ Gr. &unr_;; 'odoy`s, 'odo`ntos, a tooth + e'i^dos 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. [ 1913 Webster ]

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. [ 1913 Webster ]