12-letter words containing d, i, f, r
- florida keys — chain of small islands extending southwest from the S tip of Fla.
- florida moss — Spanish moss.
- florida room — a sunroom.
- flower child — (especially in the 1960s) a young person, especially a hippie, rejecting conventional society and advocating love, peace, and simple, idealistic values.
- 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.
- fluoridating — Present participle of fluoridate.
- fluoridation — the addition of fluorides to the public water supply to reduce the incidence of tooth decay.
- folding door — a door with hinged sections that can be folded flat against one another when opened.
- folding rule — a rule composed of light strips of wood joined by rivets so as to be foldable, all the opening and closing parts being in parallel planes.
- food pyramid — successive levels of predation in a food chain represented schematically as a pyramid because upper levels normally consist of decreasing numbers of larger predators.
- food service — the preparation, delivery, serving, etc., of ready-to-eat foods: The cafeteria employs over 20 people in food service.
- foolhardiest — Superlative form of foolhardy.
- foot soldier — an infantryman.
- footdragging — the act or practice of acting with deliberate slowness
- footsoldiers — Plural form of footsoldier.
- forbiddingly — In a forbidding manner.
- foreadmonish — (rare, transitive) To admonish beforehand, or before the act or event.
- forebodingly — a prediction; portent.
- forebuilding — (architecture,historical) An outer defense work of a castle used to protect the entrance to the keep.
- foredestined — Simple past tense and past participle of foredestine.
- foreign body — object lodged where it does not belong
- foreordained — to ordain or appoint beforehand.
- foreordinate — foreordain.
- forked chain — branched chain.
- formularized — Simple past tense and past participle of formularize.
- fort detrick — a military reservation in N Maryland, NW of Frederick.
- fort madison — a city in SE Iowa, on the Mississippi.
- fortified pa — a Māori hilltop dwelling with trenches and palisades for defensive occupation
- forward bias — a voltage applied to a circuit or device, esp a semiconductor device, in the direction that produces the larger current
- forward dive — a dive from a position facing the water in which the diver jumps up from the springboard, rotating the body forward, and enters the water either headfirst or feetfirst.
- forward line — the soldiers at the forward most position in an army force
- foster child — a child raised by someone who is not its natural or adoptive parent.
- foundationer — a person supported by funds from a foundation, or serving as a member of a foundation
- four-engined — (of an aircraft) having four engines
- four-in-hand — a long necktie to be tied in a slipknot with the ends left hanging.
- fourdriniers — Plural form of fourdrinier.
- fractionated — Simple past tense and past participle of fractionate.
- fragmentized — fragmented.
- franked mail — official mail sent by members of Congress, the vice president, and other authorized officials. Compare frank1 (defs 6–9).
- frederick ii — Frederick I (def 2).
- frederick iv — Frederick III (def 1).
- frederick ix — (Frederick Schleswig-Holstein-Sonderburg-Glucksburg) 1899–1972, king of Denmark 1947–72.
- free radical — an atom or molecule that bears an unpaired electron and is extremely reactive, capable of engaging in rapid chain reactions that destabilize other molecules and generate many more free radicals: in the body, deactivated by antioxidants, uric acid, and certain enzyme activities.
- freedom ride — (especially in the 1960s) a bus trip made to parts of the southern U.S. by persons engaging in efforts to integrate racially segregated public facilities.
- freestanding — (of sculpture or architectural elements) unattached to a supporting unit or background; standing alone.
- freeze-dried — (of foods and beverages) preserved by means of freeze-drying: freeze-dried coffee.
- freight yard — a place on a rail network where freight trains are made up or broken up
- french drain — a drainage trench filled to ground level with fragments of brick, rock, etc.
- french india — the five small former French territories in India, including Chandernagor, Karikal, Pondicherry, and Yanaon on the E coast, and Mahé on the W coast.
- fried potato — Fried potatoes are pieces of potato cooked in oil or fat.