| DROPWORT | • dropwort n. A perennial herb, Filipendula vulgaris, closely related to meadowsweet. • dropwort n. Any plant of genus Oenanthe. • dropwort n. Any plant of genus Oxypolis. |
| HOROPTER | • horopter n. For any system of binocular vision, a three-dimensional curve containing all points from which the light… • HOROPTER n. a set of points which have the same visual angle. |
| OPERATOR | • operator n. One who operates. • operator n. A telecommunications facilitator whose job is to establish temporary network connections. • operator n. (Mathematics) A function or other mapping that carries variables defined on a domain into another variable… |
| OUTROPER | • outroper n. (Law) A person to whom the business of selling by auction was confined by statute. • outroper n. (Historical) An officer in London who seized the goods of foreigners sold elsewhere than in the public market. • OUTROPER n. (obsolete) an auctioneer; the Common Crier of the City, also OUTROOPER. |
| PORTHORS | • porthors n. Alternative spelling of porteous. • PORTHORS n. (historical) a portable breviary, also PORTAS, PORTEOUS, PORTESS, PORTESSE, PORTHOS, PORTHOUSE, PORTOUS. |
| PREMOTOR | • premotor adj. (Anatomy) Near the front of the motor cortex; see premotor cortex. • premotor adj. (Physiology) Describing the interval between the arrival of a stimulus and the first changes in a muscle. • PREMOTOR adj. pertaining to a part of the frontal lobe of the brain. |
| PROCTORS | • proctors n. Plural of proctor. • PROCTOR v. to officiate as a proctor. |
| PRODITOR | • proditor n. (Obsolete) A traitor. • PRODITOR n. (Latin) a traitor. |
| PROMOTER | • promoter n. One who promotes. • promoter n. (Genetics) The section of DNA that controls the initiation of RNA transcription as a product of a gene. • promoter n. An accelerator of catalysis that is not itself a catalyst. |
| PROMOTOR | • promotor n. (Academia) A full professor of a Dutch, Flemish, South African, or German university who acts as the… • promotor n. (Chemistry) A material that accelerates the action of a catalyst. • PROMOTOR n. a person who presents candidates for graduation. |
| PRONATOR | • pronator n. (Anatomy) Any muscle that produces pronation. • PRONATOR n. a forearm or forelimb muscle. |
| PROTORES | • PROTORE n. an earlier unenriched form of a mineral ore. |
| RATPROOF | • ratproof adj. Resistant to damage caused by rats. • RATPROOF adj. impervious to rats. |
| ROTPROOF | • rotproof adj. Resistant to rotting. • rotproof v. (Transitive) To make resistant to rotting. • rot-proof adj. Alternative form of rotproof. |
| TRAPDOOR | • trapdoor n. A hinged or sliding door set into a floor or ceiling. • trapdoor n. (Theater) Such a trap set into the floor of a stage to allow fast exits and entrances. • trapdoor n. (Computing) A secret method of obtaining access to a program or online system; a backdoor. |
| TROOPERS | • troopers n. Plural of trooper. • troopers v. Third-person singular simple present indicative form of trooper. • TROOPER n. a cavalryman. |
| UPROOTER | • uprooter n. One who, or that which, uproots. • UPROOTER n. one who uproots. |