| ANUROUS | • anurous adj. Having no tail. • ANUROUS adj. tailless, also ANOUROUS. |
| ARBUTUS | • arbutus n. Any flowering plant in the genus Arbutus: the strawberry tree. • arbutus n. Epigaea repens, the mayflower, the trailing arbutus. • arbutus n. Arbute; the wood of the strawberry tree. |
| ARDUOUS | • arduous adj. Needing or using up much energy; testing powers of endurance. • arduous adj. (Obsolete) burning; ardent. • arduous adj. Difficult or exhausting to traverse. |
| ARGULUS | • Argulus prop.n. A taxonomic genus within the family Argulidae – fish lice. • ARGULUS n. (Latin) a fish louse. |
| AUBURNS | • auburns n. Plural of auburn. • AUBURN n. a reddish brown colour. |
| AUTEURS | • auteurs n. Plural of auteur. • AUTEUR n. (French) a film director, esp. when thought of as the creator of a particular genre and carrying a personal stamp, also AUTEURIST. |
| BUREAUS | • bureaus n. Plural of bureau. • BUREAU n. (French) a writing-desk with drawers for papers etc. |
| CARDUUS | • Carduus prop.n. A taxonomic genus within the family Asteraceae – many thistles native to the Old World. • CARDUUS n. (Shakespeare) a thistle. |
| PURSUAL | • pursual n. The act of pursuit. • PURSUAL n. the act of pursuit. |
| RAMULUS | • ramulus n. (Zoology) A small branch, or branchlet, of corals, hydroids, and similar organisms. • RAMULUS n. (Latin) a little branch. |
| RAUCOUS | • raucous adj. Harsh and rough-sounding. • raucous adj. Disorderly and boisterous. • raucous adj. Loud and annoying. |
| RUSSULA | • russula n. A mushroom of the genus Russula. • Russula prop.n. A taxonomic genus within the family Russulaceae – common, large, bright-colored, often edible mushrooms. • RUSSULA n. any fungus of the genus Russula. |
| SUTURAL | • sutural adj. (Botany, surgery) Of or pertaining to a suture. • SUTURAL adj. pertaining to the junction between two bones. |
| URACHUS | • urachus n. (Anatomy) A band of fibrous tissue extending from the bladder to the umbilicus. • URACHUS n. (Greek) a cord or band of fibrous tissue extending from the bladder to the umbilicus. |
| URANOUS | • uranous adj. (Chemistry) Containing uranium in lower valences than uranic compounds. • URANOUS adj. of uranium in lower valency. |
| UVULARS | • uvulars n. Plural of uvular. • UVULAR n. a sound produced by use of the uvula. |