| OPTOLOGISTS | • optologists n. Plural of optologist. • OPTOLOGIST n. an optician. |
| ORTHOEPISTS | • orthoepists n. Plural of orthoepist. • orthoëpists n. Plural of orthoëpist. • ORTHOEPIST n. one who is skilled in orthoepy. |
| ORTHOPTISTS | • orthoptists n. Plural of orthoptist. • ORTHOPTIST n. one who practises orthoptics, the science of correct vision. |
| OTOPLASTIES | • otoplasties n. Plural of otoplasty. • OTOPLASTY n. cosmetic surgery on the ears. |
| PESTOLOGIST | • pestologist n. One who studies pestology. • PESTOLOGIST n. one who studies pestology. |
| PHOTORESIST | • photoresist n. A light-sensitive film used in photolithography and photoengraving. • PHOTORESIST n. an organic material that polymerizes on exposure to ultraviolet light and in that form resists attack by acids and solvents. |
| PORTIONISTS | • portionists n. Plural of portionist. • PORTIONIST n. a postmaster of Merton College; one of two or more incumbents sharing a benefice. |
| POSTTENSION | • posttension v. (Construction) To pour concrete first and then stretch the reinforcing strands within it by means of… • post-tension v. (Construction, engineering) To apply tension (to reinforcing tendons) after casting concrete. • POSTTENSION v. to apply tension to (reinforcing steel) after concrete has set. |
| PROSCIUTTOS | • prosciuttos n. Plural of prosciutto. • PROSCIUTTO n. (Italian) aged, dry-cured Italian ham, ready to eat and usually sliced thin. |
| PROTOCTISTS | • protoctists n. Plural of protoctist. • PROTOCTIST n. any unicellular or simple multicellular organism belonging to the kingdom Protoctista, which includes protozoans, algae, and slime moulds. |
| THEOSOPHIST | • theosophist n. An advocate of, or believer in theosophy. • THEOSOPHIST n. a believer in theosophy, immediate divine illumination or wisdom, also THEOSOPH, THEOSOPHER. |
| TOPOLOGISTS | • topologists n. Plural of topologist. • TOPOLOGIST n. one who studies topology. |
| TOPONYMISTS | • toponymists n. Plural of toponymist. • TOPONYMIST n. one who studies toponymy, the study of place-names. |
| TORPEDOISTS | • torpedoists n. Plural of torpedoist. • TORPEDOIST n. one whose job is to fire torpedoes. |
| TYPOLOGISTS | • typologists n. Plural of typologist. • TYPOLOGIST n. a student of typology. |