| FONTICULUS | • fonticulus n. Synonym of fontanelle (“membranous spot on the head of a baby”). • fonticulus n. A small artificial ulcer produced by caustics or a lancet. • fonticulus n. (Anatomy) The depression just over the top of the breastbone. |
| FULIGINOUS | • fuliginous adj. Pertaining to or resembling soot in such features as colour, texture or taste; sooty, dusky. • FULIGINOUS adj. sooty; having a dark or dusky color. |
| FULMINEOUS | • fulmineous adj. Fulminous; of or pertaining to thunder. • FULMINEOUS adj. pertaining to thunder and lightning, also FULMINOUS. |
| FUNICULARS | • funiculars n. Plural of funicular. • FUNICULAR n. a cable railway ascending a mountain. |
| FUNICULATE | • funiculate adj. Forming a narrow ridge. • FUNICULATE adj. forming a narrow ridge. |
| FUSULINIDS | • fusulinids n. Plural of fusulinid. • FUSULINID n. any of a family of extinct marine foraminifera. |
| SULFONIUMS | • sulfoniums n. Plural of sulfonium. • SULFONIUM n. the positively charged group SH3, its salts or derivatives, also SULPHONIUM. |
| UNBLISSFUL | • unblissful adj. Not blissful. • UNBLISSFUL adj. not blissful. |
| UNFAITHFUL | • unfaithful adj. Not having religious faith. • unfaithful adj. Not keeping good faith; disloyal; not faithful. • unfaithful adj. Adulterous. |
| UNFAULTIER | • UNFAULTY adj. not faulty. |
| UNFLUSHING | • unflushing adj. That does not flush. • UNFLUSH v. to lose colour. |
| UNFRUITFUL | • unfruitful adj. (Chiefly figurative) Not bearing fruit. • UNFRUITFUL adj. not fruitful. |
| UNIFLOROUS | • uniflorous adj. (Botany) Bearing a single flower. • UNIFLOROUS adj. bearing one flower only; as, a uniflorous peduncle. |
| UNMERCIFUL | • unmerciful adj. Not showing mercy. • UNMERCIFUL adj. not merciful. |
| UNMUFFLING | • unmuffling v. Present participle of unmuffle. • UNMUFFLE v. to free from something that muffles. |
| UNRIGHTFUL | • unrightful adj. Not rightful. • UNRIGHTFUL adj. not rightful. |
| UNRUFFLING | • unruffling v. Present participle of unruffle. • unruffling adj. Not creating ruffles or stress. • UNRUFFLE v. to recover from ruffling. |
| UNSKILLFUL | • unskillful adj. Not skillful. • UNSKILLFUL adj. not skillful, also UNSKILFUL. |
| UNUPLIFTED | • unuplifted adj. (Poetic or archaic) Not uplifted; downcast. • UNUPLIFTED adj. not uplifted. |