12-letter words containing a, i, r, t, f
- fissirostral — having a broad, deeply cleft beak or bill, as the swallows and goatsuckers.
- flat-grained — (of sawed lumber) having the annual rings at an angle of less than 45° with the broader surfaces.
- flatteringly — In a flattering manner.
- flavoprotein — an enzyme, containing riboflavin and linked chemically with a protein, active in the oxidation of foods in animal cells.
- flight arrow — an arrow having a conical or pyramidal head without barbs.
- float bridge — a bridge, as from a pier to a boat, floating at one end and hinged at the other to permit loading and unloading at any level of water.
- floating rib — one member of the two lowest pairs of ribs, which are attached neither to the sternum nor to the cartilages of other ribs.
- flowcharting — (computing) the design and construction of flowcharts.
- fluidextract — a liquid preparation, containing alcohol as a solvent or as a preservative, that contains in each cubic centimeter the medicinal activity of one gram of the crude drug in powdered form.
- fluorapatite — a crystalline mineral, Ca 5 (PO 4) 3 F, formed from hydroxyapatite in the presence of fluoride, that has a hardening effect on bones and teeth.
- fluoridating — Present participle of fluoridate.
- fluoridation — the addition of fluorides to the public water supply to reduce the incidence of tooth decay.
- fluorinating — Present participle of fluorinate.
- fluorination — (chemistry) The introduction of fluorine into a compound by means of a chemical reaction.
- flusteration — (colloquial, dated) The act of flustering, or the state of being flustered.
- flying start — a start, as in sailboat racing, in which the entrants begin moving before reaching the starting line.
- foolhardiest — Superlative form of foolhardy.
- foot traffic — the wear and tear caused to a surface by people walking on it
- footdragging — the act or practice of acting with deliberate slowness
- for all time — forever, for eternity
- for instance — a case or occurrence of anything: fresh instances of oppression.
- for-instance — an instance or example: Give me a for-instance of what you mean.
- foraging ant — any of several ants, as army ants, that forage as part of a large group.
- fore-topsail — a topsail set on a foremast on a ship.
- foreordinate — foreordain.
- forestalling — Present participle of forestall.
- forestaysail — a triangular sail set on a forestay; the innermost headsail of a vessel.
- foretopsails — Plural form of foretopsail.
- foretriangle — the triangular area formed by the deck, foremast, and headstay of a sailing vessel
- forgeability — (metallurgy) The quality or degree of being forgeable.
- formula unit — (of an ionic compound that does not form molecules, as most salts) the chemical formula with the least number of elements out of the set of empirical formulas having the same proportion of ions as elements: NaCl is the formula unit for the ionic compound sodium chloride.
- formulations — Plural form of formulation.
- fornications — Plural form of fornication.
- fornicatress — (obsolete) A woman guilty of fornication.
- fort laramie — a city in SE Wyoming.
- fort madison — a city in SE Iowa, on the Mississippi.
- fort pulaski — Count Casimir [kaz-uh-meer] /ˈkæz əˌmɪər/ (Show IPA), 1748–79, Polish patriot; general in the American Revolutionary army.
- fort william — a port in W Ontario, in S Canada, on Lake Superior: created in 1970 by the merger of twin cities (Fort William and Port Arthur) and two adjoining townships.
- fortepianist — the player of a fortepiano
- fortified pa — a Māori hilltop dwelling with trenches and palisades for defensive occupation
- fotheringhay — a village in NE Northamptonshire, in E England, near Peterborough: Mary, Queen of Scots, imprisoned here and executed 1587.
- foundationer — a person supported by funds from a foundation, or serving as a member of a foundation
- fracastorius — a walled plain in the fourth quadrant of the face of the moon: about 60 miles (97 km) in diameter.
- fractionally — pertaining to fractions; comprising a part or the parts of a unit; constituting a fraction: fractional numbers.
- fractionated — Simple past tense and past participle of fractionate.
- fractionator — Chemistry. an apparatus for fractional distillation. Compare cracker (def 10).
- fragmentized — fragmented.
- franc-tireur — a sharpshooter in the French army.
- francescatti — Zino [zee-noh] /ˈzi noʊ/ (Show IPA), 1905–1991, French violinist.
- frangibility — The state or quality of being frangible.