| MONOPHYODONT | • monophyodont adj. (Biology) Having only one set of teeth. • monophyodont n. (Biology) Any organism with only one set of teeth. • MONOPHYODONT n. an animal with only one set of teeth. |
| ODONTOPHOBIA | • odontophobia n. An irrational fear of dentistry. • ODONTOPHOBIA n. the fear of teeth. |
| ODONTOPHORAL | • odontophoral adj. Relating to the odontophore. • ODONTOPHORAL adj. of or like an odontophore, the rasping apparatus in molluscs, also ODONTOPHORAN. |
| ODONTOPHORAN | • ODONTOPHORAN n. an odontophore, the rasping apparatus in molluscs. |
| ODONTOPHORES | • odontophores n. Plural of odontophore. • ODONTOPHORE n. the rasping apparatus in molluscs. |
| OOPHORECTOMY | • oophorectomy n. (Medicine) Surgical removal of one or both ovaries. • oöphorectomy n. Alternative spelling of oophorectomy. • OOPHORECTOMY n. the operation of removing one or both of the ovaries, aka ovariotomy. |
| OPISTHODOMOI | • opisthodomoi n. Plural of opisthodomos. • OPISTHODOMOS n. (Greek) a portico or apartment at the back of an ancient Greek or Roman temple. |
| OPISTHODOMOS | • opisthodomos n. (Greek architecture) A porch at the rear of a temple, set against the blank back wall of the cella. • OPISTHODOMOS n. (Greek) a portico or apartment at the back of an ancient Greek or Roman temple. |
| OPISTHOTONOS | • opisthotonos n. (Medicine) Sustained tetanic spasm in which the body is bent backwards and stiffened, as produced by various diseases. • OPISTHOTONOS n. extreme arching backwards of the spine and neck as a result of spasm of the muscles in that region, etc. |
| ORTHOTROPOUS | • orthotropous adj. (Botany, of an ovule) Growing straight and having the micropyle at the apex. • ORTHOTROPOUS adj. growing straight, so that the micropyle is opposite the stalk. |
| PHOTOBIOLOGY | • photobiology n. The study of the effects of light on living organisms, and on biological processes. • PHOTOBIOLOGY n. the study of the effects of light on organisms. |
| PHOTOCOMPOSE | • photocompose v. To use photocomposition to prepare text for printing. • PHOTOCOMPOSE v. to set (as reading matter) by photocomposition. |
| PHOTOGEOLOGY | • photogeology n. The use of aerial photography to interpret geologic features. • PHOTOGEOLOGY n. a branch of geology concerned with the identification and study of geological features through the study of aerial or orbital photographs. |
| ZOOPATHOLOGY | • zoopathology n. Animal pathology; veterinary pathology. • zoöpathology n. Alternative form of zoopathology. • ZOOPATHOLOGY n. the study of animal diseases. |
| ZOOPHYTOLOGY | • zoophytology n. The natural history of zoophytes. • zoöphytology n. Archaic spelling of zoophytology. • ZOOPHYTOLOGY n. the study of zoophytes, plantlike animals. |