| AUTOPILOTS | • autopilots n. Plural of autopilot. • AUTOPILOT n. a device which can be set to guide and control an aircraft or a ship on a chosen course. |
| AUTOPOINTS | • AUTOPOINT n. a point-to-point over rough country in motor vehicles. |
| AUTOSPORTS | • autosports n. Plural of autosport. • AUTOSPORT n. the sport of motor-racing. |
| AUTOTROPHS | • autotrophs n. Plural of autotroph. • AUTOTROPH n. an organism that is able to manufacture its own food from inorganic substances. |
| OUTPORTERS | • OUTPORTER n. (Canadian) an inhabitant or native of a Newfoundland outport. |
| OUTSPORTED | • outsported v. Simple past tense and past participle of outsport. • OUTSPORT v. (Shakespeare) to sport beyond the limits of. |
| PHOTOTONUS | • phototonus n. Sensitivity to, or irritation caused by, light. • PHOTOTONUS n. the sensitivity of a living organism to light. |
| PHOTOTUBES | • phototubes n. Plural of phototube. • PHOTOTUBE n. an electron tube with a photoemissive cathode. |
| PORTENTOUS | • portentous adj. Of momentous or ominous significance. • portentous adj. Ominously prophetic. • portentous adj. Puffed up with vanity. |
| POSTULATOR | • postulator n. A person who postulates something as the basis of an argument. • postulator n. A Roman Catholic official who makes the case for the beatification or canonization of a proposed saint. • POSTULATOR n. an official who presents case for canonization or beatification. |
| POTATOBUGS | • potato␣bugs n. Plural of potato bug. • POTATOBUG n. the Colorado beetle. |
| PROSCIUTTO | • prosciutto n. A dry-cured ham from Italy, thinly sliced. • PROSCIUTTO n. (Italian) aged, dry-cured Italian ham, ready to eat and usually sliced thin. |
| PUTTYROOTS | • puttyroots n. Plural of puttyroot. • PUTTYROOT n. an American orchidaceous plant which flowers in early summer. |