| OPTOMETRIST | • optometrist n. A person trained and skilled in examining and testing the eyes for defects, in order to prescribe corrective… • OPTOMETRIST n. an ophthalmic optician; a person qualified to practise optometry. |
| ORTHOPTISTS | • orthoptists n. Plural of orthoptist. • ORTHOPTIST n. one who practises orthoptics, the science of correct vision. |
| OUTPLOTTING | • outplotting v. Present participle of outplot. • OUTPLOT v. to surpass in plotting. |
| PHOTOSETTER | • photosetter n. A photocomposer; a machine for photosetting. • PHOTOSETTER n. an apparatus for photosetting. |
| PHOTOSTATED | • photostated v. Simple past tense and past participle of photostat. • PHOTOSTAT v. to make facsimiles by this means. |
| PHOTOSTATIC | • photostatic adj. Relating to xerography. • photostatic adj. (Biochemistry) Relating to photostasis. • PHOTOSTATIC adj. of, made by, or using a photostat. |
| PHOTOTACTIC | • phototactic adj. Of or relating to phototaxis. • PHOTOTACTIC adj. exhibiting phototaxis. |
| PHYTOTOMIST | • phytotomist n. One versed in phytotomy. • PHYTOTOMIST n. a student of phytotomy. |
| POTENTIATOR | • potentiator n. (Biology) A reagent that enhances sensitization of an antigen. • potentiator n. (Medicine) A drug that enhances the response to another. • potentiator n. A flavour enhancer. |
| POTSHOTTING | • potshotting v. Present participle of potshot. • POTSHOTTING n. the act of taking a potshot. |
| POTTYMOUTHS | • pottymouths n. Plural of pottymouth. • potty␣mouths n. Plural of potty mouth. • POTTYMOUTH n. one given to habitual use of bad language. |
| PROSTITUTOR | • prostitutor n. A person who prostitutes him- or herself or another person. • prostitutor n. A person who prostitutes his or her abilities or talents. • PROSTITUTOR n. one who prostitutes. |
| 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. |
| TOOTHPASTES | • toothpastes n. Plural of toothpaste. • TOOTHPASTE n. a paste for cleaning the teeth. |
| TOPLOFTIEST | • toploftiest adj. Superlative form of toplofty: most toplofty. • TOPLOFTY adj. high and mighty, haughty, also TOPLOFTICAL. |
| TOTIPOTENCY | • totipotency n. (Biology) The ability of a cell to produce differentiated cells upon division. • TOTIPOTENCY n. the state of being totipotent, capable of development into a complete organ or embryo. |