| OPTOMETRISTS | • optometrists n. Plural of optometrist. • OPTOMETRIST n. an ophthalmic optician; a person qualified to practise optometry. |
| ORTHOPTERIST | • orthopterist n. An entomologist who specialises in orthopters. • ORTHOPTERIST n. a student of insects. |
| OSTEOPATHIST | • osteopathist n. An osteopath. • OSTEOPATHIST n. a practitioner of osteopathy, also OSTEOPATH. |
| PHOTOMETRIST | • photometrist n. A specialist in photometry. • PHOTOMETRIST n. one who practises photometry, that branch of science which treats of the measurement of the intensity of light. |
| PHOTOSETTERS | • photosetters n. Plural of photosetter. • PHOTOSETTER n. an apparatus for photosetting. |
| PHOTOSETTING | • photosetting v. Present participle of photoset. • PHOTOSETTING n. composing (matter) by projecting film from which a printing plate is made. |
| PHOTOSTATTED | • photostatted v. Simple past tense and past participle of photostat. • PHOTOSTAT v. to make facsimiles by this means. |
| PHOTOTYPESET | • phototypeset v. (Transitive) To typeset by a phototypesetting process. • PHOTOTYPESET v. to set (type matter) by phototypesetting. |
| POTENTIATION | • potentiation n. The action of a substance, at a dose that does not itself have an adverse action, in enhancing the effect… • POTENTIATION n. the act of potentiating. |
| POTENTIATORS | • potentiators n. Plural of potentiator. • POTENTIATOR n. one who potentiates. |
| PROTECTORATE | • protectorate n. Government by a protector; especially, the government of England, Scotland, and Ireland by Oliver Cromwell. • protectorate n. The authority assumed by a superior power over an inferior or a dependent one, whereby the former protects… • protectorate n. An autonomous territory that is protected diplomatically or militarily against third parties by a stronger… |
| PROTESTATION | • protestation n. A formal solemn objection or other declaration. • protestation n. (Law, historical) A declaration in common-law pleading, by which the party interposes an oblique allegation… • PROTESTATION n. an avowal or solemn declaration. |
| TROPOSCATTER | • troposcatter n. Tropospheric scatter. • TROPOSCATTER n. the propagation of radio waves by using irregularities in the troposphere to scatter the signals beamed up by means of high-powered UHF transmitters and parabolic antennas. |