| MONOPHTHONG | • monophthong n. A vowel (in the sense of a sound rather than a letter of the alphabet) that has the same sound throughout… • MONOPHTHONG n. two written vowels representing a single sound, e.g. 'oo', 'oa'. |
| MONOSTROPHE | • monostrophe n. A metrical composition having a single strophe. • MONOSTROPHE n. a poem in which all the stanzas or strophes are written in the same metre. |
| 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. |
| 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. |
| ORNITHOPODS | • ornithopods n. Plural of ornithopod. • ORNITHOPOD n. a member of a suborder of bipedal ornithischian (bird-hipped) dinosaurs. |
| ORTHOPNOEAS | • orthopnoeas n. Plural of orthopnoea. • ORTHOPNOEA n. the ability to breathe in an upright position only. |
| ORTHOPTERON | • orthopteron n. Alternative form of orthopteran. • ORTHOPTERON n. any member of the Orthoptera, an order of mandibulate insects, also ORTHOPTERAN. |
| PHONOLOGIST | • phonologist n. (Linguistics) A person who specializes in phonology, the functional use of sounds in language. • PHONOLOGIST n. a student of phonology, the branch of linguistics that deals with systems of sounds. |
| PHOTOIONISE | • PHOTOIONISE v. to ionize by electromagnetic radiation, also PHOTOIONIZE. |
| PHOTOIONIZE | • photoionize v. (Physics) To cause, or to undergo photoionization. • PHOTOIONIZE v. to ionize by electromagnetic radiation, also PHOTOIONISE. |
| PHOTONOVELS | • photonovels n. Plural of photonovel. • PHOTONOVEL n. a novel in the form of a series of photographs with speech balloons. |
| PHOTOPHONES | • photophones n. Plural of photophone. • PHOTOPHONE n. an apparatus for the production of sound by the action of rays of light. |
| PHOTOPHONIC | • photophonic adj. Of or pertaining to the photophone. • PHOTOPHONIC adj. relating to photophony. |
| PHOTOSENSOR | • photosensor n. A photodetector. • PHOTOSENSOR n. a detector that is sensitive to electromagnetic radiation. |
| THORNPROOFS | • thornproofs n. (Dated) Thornproof trousers. • THORNPROOFS n. garments that resist penetration by thorns. |