| BUTTERFLYFISH | • butterflyfish n. Any of a group of conspicuous tropical marine fish of the family Chaetodontidae; the bannerfish and… • butterfly␣fish n. Any fish of the family Chaetodontidae. • butterfly␣fish n. Pantodon buchholzi, a small brown fish of western African streams, often found in aquariums. |
| COUNTERFEITLY | • counterfeitly adv. In a counterfeit way; falsely. • COUNTERFEIT adv. imitation, also COUNTERFECT. |
| FLUIDEXTRACTS | • fluidextracts n. Plural of fluidextract. • FLUIDEXTRACT n. an alcohol preparation of a plant-derived drug containing the active constituents of one gram of the dry drug in each milliliter. |
| FLUORAPATITES | • fluorapatites n. Plural of fluorapatite. • FLUORAPATITE n. a mineral consisting of calcium phosphate fluoride, the most common form of apatite. |
| FLUOROACETATE | • fluoroacetate n. (Chemistry) Any salt of fluoroacetic acid. • FLUOROACETATE n. an organofluorine compound. |
| FLUTTERBOARDS | • flutterboards n. Plural of flutterboard. • FLUTTERBOARD n. a kind of swimming aid, a kickboard. |
| MULTIFEATURED | • multifeatured adj. Having many features. |
| TETRAFLUORIDE | • tetrafluoride n. (Chemistry) Any chloride containing four fluorine atoms in each molecule. • TETRAFLUORIDE n. a fluoride containing four atoms of fluorine. |
| ULTRAFILTERED | • ultrafiltered adj. Filtered using ultrafiltration. • ULTRAFILTER v. to pass through an ultrafilter. |
| ULTRAFILTRATE | • ultrafiltrate n. The filtrate produced by ultrafiltration. • ultrafiltrate v. To subject to ultrafiltration. • ULTRAFILTRATE n. a substance that has passed through an ultrafilter. |
| ULTRALEFTISMS | • ultraleftisms n. Plural of ultraleftism. • ULTRALEFTISM n. support of the extreme left. |
| ULTRALEFTISTS | • ultraleftists n. Plural of ultraleftist. • ULTRALEFTIST n. one who supports the extreme Left. |
| UNFATHERLIEST | • UNFATHERLY adj. not fatherly. |
| UNFORGETTABLE | • unforgettable adj. Very difficult or impossible to forget. • UNFORGETTABLE adj. incapable of being forgotten. |
| UNFORGETTABLY | • unforgettably adv. In an unforgettable manner; very memorably. • UNFORGETTABLE adv. incapable of being forgotten. |
| UNFORTUNATELY | • unfortunately adv. Happening through bad luck, or because of some unfortunate event. • unfortunately adv. Used (as a parenthetical word) to express disappointment, compassion, sorrow, regret or grief. • UNFORTUNATE adv. not fortunate. |