| ODONATOLOGIST | • odonatologist n. One who studies odonatology. • ODONATOLOGIST n. one who studies dragonflies. |
| ODONATOLOGISTS | • odonatologists n. Plural of odonatologist. • ODONATOLOGIST n. one who studies dragonflies. |
| ODONTOLOGIST | • odontologist n. One who studies teeth. • ODONTOLOGIST n. a student of odontology. |
| ODONTOLOGISTS | • odontologists n. Plural of odontologist. • ODONTOLOGIST n. a student of odontology. |
| ONOMATOLOGIST | • onomatologist n. One versed in the history of names. • ONOMATOLOGIST n. one who studies onomatology, the science of names. |
| ONOMATOLOGISTS | • onomatologists n. Plural of onomatologist. • ONOMATOLOGIST n. one who studies onomatology, the science of names. |
| ONOMATOPOETIC | • onomatopoetic adj. (Uncommon) Synonym of onomatopoeic. • ONOMATOPOETIC adj. onomatopoeic. |
| 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. |
| OPISTHOTONOSES | • OPISTHOTONOS n. extreme arching backwards of the spine and neck as a result of spasm of the muscles in that region, etc. |
| PHOTOCONDUCTION | • photoconduction n. A change (normally an increase) in the electrical conductivity of a material as a result of incident… • PHOTOCONDUCTION n. conduction of electricity resulting from the absorption of light. |
| PHOTOIONISATION | • photoionisation n. (Physics) The ejection of electrons from an atom or other species following the absorption of photons. • PHOTOIONISATION n. ionization (as in the ionosphere) of a molecule or atom caused by absorption of radiant energy, also PHOTOIONIZATION. |
| PHOTOIONIZATION | • photoionization n. Alternative spelling of photoionisation. • PHOTOIONIZATION n. ionization (as in the ionosphere) of a molecule or atom caused by absorption of radiant energy, also PHOTOIONISATION. |
| PHOTOOXIDATION | • photooxidation n. (Physics, chemistry) The loss of an electron from a photoexcited species. • photooxidation n. (Chemistry) The reaction of something with oxygen in the presence of light. • PHOTOOXIDATION n. oxidation under the influence of radiant energy, as light. |
| PHOTOOXIDATIONS | • photooxidations n. Plural of photooxidation. • PHOTOOXIDATION n. oxidation under the influence of radiant energy, as light. |
| PHOTOPRODUCTION | • photoproduction n. (Chemistry) The production of a molecular species (e.g. a radical or ion) by means of light. • PHOTOPRODUCTION n. the production of one or more particles by the action of an incident photon. |