| ODONATOLOGY | • odonatology n. (Entomology) The study of dragonflies and often damselflies. • ODONATOLOGY n. the study of dragonflies. |
| ODONTALGIAS | • odontalgias n. Plural of odontalgia. • ODONTALGIA n. toothache, also ODONTALGY. |
| ODONTALGIES | • ODONTALGY n. toothache, also ODONTALGIA. |
| ODONTOBLAST | • odontoblast n. A cell on the outer surface of dental pulp that produces tooth dentin. • ODONTOBLAST n. a tooth cell in the surface of dental pulp that produces dentine. |
| ODONTOCETES | • odontocetes n. Plural of odontocete. • ODONTOCETE n. a subdivision of Cetacea, including the sperm whale, dolphins, etc.; the toothed whales. |
| ODONTOGENIC | • odontogenic adj. Of or pertaining to the formation and development of teeth. • odontogenic adj. That originates in the tissues of the teeth. • ODONTOGENIC adj. relating to odontogeny, the origin and development of teeth. |
| ODONTOGRAPH | • odontograph n. An instrument for marking or laying off the outlines of teeth of gear wheels. • ODONTOGRAPH n. an instrument for obtaining curves for gear-teeth. |
| ODONTOLITES | • odontolites n. Plural of odontolite. • ODONTOLITE n. a fossil bone or tooth coloured blue with phosphate of iron, aka bone-turquoise. |
| ODONTOLOGIC | • odontologic adj. Alternative form of odontological. • ODONTOLOGIC adj. relating to odontology, also ODONTOLOGICAL. |
| ODONTOPHORE | • odontophore n. A projection in the mouths of most molluscs, used with the radula to break up food. • ODONTOPHORE n. the rasping apparatus in molluscs. |
| ODORIFEROUS | • odoriferous adj. Having an odor or fragrance. • ODORIFEROUS adj. giving off an odour; morally offensive, also ODIFEROUS. |
| ODORIPHORES | • ODORIPHORE n. the group of atoms in an odorous molecule responsible for its odour. |
| ODOROUSNESS | • odorousness n. The quality of being odorous. • ODOROUSNESS n. the state of being odorous. |