| BIFILARLY | • bifilarly adv. In a bifilar manner. • BIFILAR adv. having two threads.
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| BIRDLIFES | • BIRDLIFE n. birds collectively. | 
| FEBRILITY | • febrility n. Feverishness. • FEBRILITY n. feverishness.
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| FIBERFILL | • fiberfill n. (US) A lightweight synthetic fiber used as insulation in clothing. • FIBERFILL n. (US) synthetic fibres used as a filling material, also FIBREFILL.
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| FIBERLIKE | • fiberlike adj. (American spelling) Like fiber; fibrous. • FIBERLIKE adj. like a fiber, also FIBRELIKE.
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| FIBREFILL | • fibrefill n. Alternative form of fiberfill. • FIBREFILL n. synthetic fibres used as a filling material, also FIBERFILL.
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| FIBRELIKE | • fibrelike adj. Like fibre; fibrous. • FIBRELIKE adj. like a fibre, also FIBERLIKE.
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| FIBRILLAE | • fibrillae n. Plural of fibrilla. • FIBRILLA n. (Latin) a small fibre, also FIBRIL.
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| FIBRILLAR | • fibrillar adj. (Not comparable) Of or pertaining to fibrils. • fibrillar adj. Having the characteristics of fibrils.
 • FIBRILLAR adj. relating to a fibril, also FIBRILAR, FIBRILLARY.
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| FIBRILLIN | • fibrillin n. A glycoprotein present in human skin, necessary for forming the elastic fibres in connective tissue. • FIBRILLIN n. a protein found in connective tissue.
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| FIBROLINE | • fibroline n. A kind of yarn made from textile waste. • FIBROLINE n. a yarn of flax, jute and hemp waste.
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| FIBROLITE | • fibrolite n. (Mineralogy) Sillimanite. • FIBROLITE n. (tradename) a type of building board containing asbestos and cement , also FIBRO, FIBROCEMENT.
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| FRIBBLING | • fribbling v. Present participle of fribble. • FRIBBLE v. to be frivolous, trifle.
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| FRIBBLISH | • fribblish adj. Frivolous; trifling. • FRIBBLISH adj. (obsolete) trifling.
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| INFERIBLE | • inferible adj. Alternative spelling of inferrible (synonym of inferable). • INFERIBLE adj. that can be inferred, also INFERABLE, INFERRABLE, INFERRIBLE.
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| LIBRIFORM | • libriform adj. (Botany) Resembling or having the form of liber, or bast. • LIBRIFORM adj. shaped like a book.
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| MYOFIBRIL | • myofibril n. (Anatomy) Any of the cylindrical organelles, found within muscle cells, that are the contractile unit of muscles. • MYOFIBRIL n. a contractile element of a muscle cell.
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| RIFLEBIRD | • riflebird n. Any of four species of birds of paradise in the genus Ptiloris. • RIFLEBIRD n. each of three birds of paradise of the genus Ptiloris, having velvety black plumage with bright coloured patches, and a long bill.
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