| BUSULFANS | • BUSULFAN n. a drug used to treat leukaemia. |
| FRENULUMS | • frenulums n. Plural of frenulum. • FRENULUM n. (Latin) a connecting fold of membrane, also FRENUM, FRAENUM. |
| FULMINOUS | • fulminous adj. Explosive. • fulminous adj. (Figurative) furious. • FULMINOUS adj. relating to thunder and lightning, also FULMINEOUS. |
| FUNICULUS | • funiculus n. (Anatomy) Any of several cordlike structures, especially the umbilical cord, or a bundle of nerve fibres… • funiculus n. (Botany) A stalk that connects the seed (or ovule) with the placenta. • FUNICULUS n. (Latin) the umbilical cord. |
| FURUNCLES | • furuncles n. Plural of furuncle. • FURUNCLE n. a painful swelling of the skin. |
| FUSULINID | • fusulinid n. Any of the Fusulinidae., an extinct family of fusulinacean Foraminifera. • FUSULINID n. any of a family of extinct marine foraminifera. |
| SULFONIUM | • sulfonium n. (Inorganic chemistry) the univalent H3S+ cation, derived from sulfane. • sulfonium n. (Organic chemistry) any derivative of this cation in which one or more hydrogen atoms are replaced by… • SULFONIUM n. the positively charged group SH3, its salts or derivatives, also SULPHONIUM. |
| SULFURING | • sulfuring v. Present participle of sulfur. • sulfuring n. Treatment with sulfur or sulfur compounds. • SULFUR v. to treat with sulfur, also SULPHUR. |
| TRUNKFULS | • trunkfuls n. Plural of trunkful. • TRUNKFUL n. as much as a storage box can hold. |
| UNBASHFUL | • unbashful adj. Not bashful. • UNBASHFUL adj. not bashful or modest. |
| UNFLUSHED | • unflushed adj. Not flushed. • UNFLUSH v. to lose colour. |
| UNFLUSHES | • unflushes v. Third-person singular simple present indicative form of unflush. • UNFLUSH v. to lose colour. |
| UNFUSSILY | • unfussily adv. In an unfussy way; without fuss. • UNFUSSY adv. not fussy. |
| UNMUFFLES | • unmuffles v. Third-person singular simple present indicative form of unmuffle. • UNMUFFLE v. to free from something that muffles. |
| UNRESTFUL | • unrestful adj. Not restful. • UNRESTFUL adj. not restful. |
| UNRUFFLES | • unruffles v. Third-person singular simple present indicative form of unruffle. • UNRUFFLE v. to recover from ruffling. |
| UNSKILFUL | • unskilful adj. (Britain) Alternative spelling of unskillful. • UNSKILFUL adj. not skilful, also UNSKILLFUL. |
| UNWISHFUL | • unwishful adj. Not wishful. • UNWISHFUL adj. not wishful. |