n. an extinct order of primitive vertebrates; the precise taxonomy is not clear; in some classifications it is considered a separate phylum.
Syn. -- order Conodonta, Conodontophorida, order Conodontophorida. [ WordNet 1.5 ]

A combining form from Gr. 'odoy`s, 'odo`ntos, a tooth. [ 1913 Webster ]

n. [ Odonto- + -blast. ] [ 1913 Webster ]

1. (Anat.) One of the more or less columnar cells on the outer surface of the pulp of a tooth; an odontoplast. They are supposed to be connected with the formation of dentine. [ 1913 Webster ]

2. (Zool.) One of the cells which secrete the chitinous teeth of Mollusca. [ 1913 Webster ]

‖n. pl. [ NL., from Gr. 'odoy`s, 'odo`ntos, a tooth + kh^tos a whale. ] (Zool.) A subdivision of Cetacea, including the sperm whale, dolphins, etc.; the toothed whales. [ 1913 Webster ]

n. [ Odonto- + root of Gr. gi`gnesqai to be born: cf: F. odontogénie. ] (Physiol.) Generation, or mode of development, of the teeth. [ 1913 Webster ]

n. [ Odonto- + -graph. ] An instrument for marking or laying off the outlines of teeth of gear wheels. [ 1913 Webster ]

a. Of or pertaining to odontography. [ 1913 Webster ]

n. A description of the teeth. [ 1913 Webster ]

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 ]

‖prop. n. pl. [ NL., from Gr. 'odoy`s, 'odo`ntos, a tooth + &unr_; 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. ] [ 1913 Webster ]

n. [ Odonto- + -lite. ] (Min.) A fossil tooth colored a bright blue by phosphate of iron. It is used as an imitation of turquoise, and hence called bone turquoise. [ 1913 Webster ]

n. [ Odonto- + -logy: cf. F. odontologie. ] The science which treats of the teeth, their structure and development. [ 1913 Webster ]

‖n. pl. [ NL. See Odontophore. ] (Zool.) Same as Cephalophora. [ 1913 Webster ]

n. [ Odonto- + Gr. fe`rein to bear. ] (Zool.) A special structure found in the mouth of most mollusks, except bivalves. It consists of several muscles and a cartilage which supports a chitinous radula, or lingual ribbon, armed with teeth. Also applied to the radula alone. See Radula. [ 1913 Webster ]

a. (Zool.) Having an odontophore. [ 1913 Webster ]

n. [ Odonto- + Gr. pla`ssein to form, mold. ] (Anat.) An odontoblast. [ 1913 Webster ]

‖n. [ NL., fr. Gr. 'odoy`s, 'odo`ntos, a tooth + pte`ryx a wing. ] (Paleon.) An extinct Eocene bird having the jaws strongly serrated, or dentated, but destitute of true teeth. It was found near London. [ 1913 Webster ]

‖n. pl. [ NL., fr. Gr. 'odoy`s, 'odo`ntos, a tooth + &unr_;, &unr_;, a bird. ] (Paleon.) A group of Mesozoic birds having the jaws armed with teeth, as in most other vertebrates. They have been divided into three orders: Odontolcae, Odontotormae, and Saururae. [ 1913 Webster ]

a. [ Odonto- + Gr. &unr_;, &unr_;, the mouth. ] (Zool.) Having toothlike mandibles; -- applied to certain insects. [ 1913 Webster ]

‖n.pl. [ NL., fr. 'odoy`s, 'odo`ntos, a tooth + &unr_; a socket. ] (Paleon.) An order of extinct toothed birds having the teeth in sockets, as in the genus Ichthyornis. See Ichthyornis. [ 1913 Webster ]

a. [ Xantho- + Gr. 'odoy`s, 'odo`ntos, tooth. ] Having yellow teeth. [ 1913 Webster ]