| BOORTREE | • BOORTREE n. (Scots) the elder-tree, also BOURTREE, BOUNTREE. |
| CORRETTO | • CORRETTO n. (Italian) espresso with booze. |
| 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… |
| OROMETER | • orometer n. An aneroid barometer having a second scale that gives the approximate elevation above sea level of the… • OROMETER n. a barometer showing height above sea-level. |
| 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. |
| 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. |
| 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. |
| PROTORES | • PROTORE n. an earlier unenriched form of a mineral ore. |
| RATOONER | • ratooner n. (Agriculture) A plant that sprouts ratoons. • RATOONER n. a plant that ratoons. |
| REDROOTS | • redroots n. Plural of redroot. • REDROOT n. a plant with a red root and red sap, and bearing a pretty, white flower in early spring, aka puccoon, bloodroot. |
| RESTROOM | • restroom n. (US, euphemistic) A room containing a public toilet: a public lavatory. • rest␣room n. Alternative spelling of restroom. • RESTROOM n. a room furnished with toilets and washbasins. |
| ROOFTREE | • rooftree n. The primary beam of a roof; the ridgepole; hence, the roof itself. • rooftree n. (Figuratively) A home; a household. • roof␣tree n. (Archaic) The ridgepole of a peaked roof, especially that of a house. |
| ROOSTERS | • roosters n. Plural of rooster. • ROOSTER n. a domestic cock. |
| ROOTSIER | • rootsier adj. Comparative form of rootsy: more rootsy. • ROOTSY adj. reminiscent of folk styles. |
| ROSEROOT | • roseroot n. Rhodiola rosea, a perennial crassulaceous plant with many claimed health benefits that grows in cold regions. • ROSEROOT n. a fleshy-leaved herb, so called because the roots have the odor of roses. |
| SORORATE | • sororate n. The custom of the marriage of a man to the sister of his wife, usually after the wife has died. • sororate n. A marriage according to this custom. • SORORATE n. the marriage of a man with his dead wife's sister. |
| TOREADOR | • toreador n. (Bullfighting) A bullfighter, especially one on horseback. • TOREADOR n. (Spanish) the old name for a torero, a bullfighter, esp. on horseback. |
| 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. |