18-letter words containing r, o, f, l
- declaration of war — a formal statement made by one country to another that a state of war now exists between them
- defense calculator — IBM 701
- deliver oneself of — to speak with deliberation or at length
- departure platform — a raised area at a railway station from which passengers can board trains prior to their departing
- diaminofluorescein — (organic compound) A fluorescein into which two amino groups have been substituted.
- division of labour — a system of organizing the manufacture of an article in a series of separate specialized operations, each of which is carried out by a different worker or group of workers
- due process of law — the administration of justice in accordance with established rules and principles
- eleanor of castile — 1246–90, Spanish wife of Edward I of England. Eleanor Crosses were erected at each place at which her body rested between Nottingham, where she died, and London, where she is buried
- electronic warfare — the military use of electronics to prevent or reduce an enemy's effective use and to protect friendly use of electromagnetic radiation equipment
- fall to the ground — (of a plan, theory, etc) to be rendered invalid, esp because of lack of necessary information
- fallot's tetralogy — a congenital heart disease in which there are four defects: pulmonary stenosis, enlarged right ventricle, a ventricular septal defect, and an aorta whose origin lies over the septal defect. In babies suffering this disease the defects can be corrected by surgery
- false imprisonment — the unlawful restraint of a person from exercising the right to freedom of movement.
- family-tree theory — a theory that describes language change in terms of genetically related languages developing in successive splits from a common parent language, such as Indo-European, as depicted by a family tree diagram.
- farewell-to-spring — a slender, showy plant, Clarkia amoena, of the evening primrose family, native to western North America, having satiny, cup-shaped, lilac-crimson or reddish-pink flowers and roundish fruit.
- farm the long acre — to graze cows on the verge of a road
- farmer-labor party — a political party in Minnesota, founded in 1920 and merged with the Democratic Party in 1944.
- federal government — pertaining to or of the nature of a union of states under a central government distinct from the individual governments of the separate states, as in federal government; federal system.
- feldenkrais method — a system of gentle movements that promote flexibility, coordination, and self-awareness
- fermat's last post — (humour) A post to a bug tracker, mailing list or forum in which the author claims to have found a simple fix or workaround for a bug, but never says what it is and never shows up again to explain it (even after others have been puzzling over the bug for years).
- ferrite-rod aerial — a type of aerial, normally used in radio reception, consisting of a small coil of wire mounted on a ferrite core, the coil serving as a tuning inductance
- fettuccine alfredo — fettuccine in cream sauce with grated Parmesan cheese.
- fibrocartilaginous — a type of cartilage having a large number of fibers.
- file control block — (operating system) (FCB) An MS-DOS data structure that stores information about an open file. The number of FCBs is configured in CONFIG.SYS with a command FCBS=x,y where x (between 1 and 255 inclusive, default 4) specifies the number of file control blocks to allocate and therefore the number of files that MS-DOS can have open at one time. y (not needed from DOS 5.0 onward) specifies the number of files to be closed automatically if all x are in use.
- fire in your belly — If you say that someone has fire in their belly, you are expressing approval of them because they are energetic, enthusiastic, and have very strong feelings.
- firecracker flower — a plant, Dichelostemma ida-maia, of the amaryllis family, native to California and Oregon, having clusters of tubular scarlet flowers.
- first class module — (programming) A module that is a first class data object of the programming language, e.g. a record containing functions. In a functional language, it is standard to have first class programs, so program building blocks can have the same status.
- fischer von erlach — Johann Bernhard [yaw-hahn bern-hahrt] /ˈyɔ hɑn ˈbɛrn hɑrt/ (Show IPA), 1656–1723, Austrian architect.
- fissure of rolando — central sulcus.
- fissure of sylvius — lateral fissure.
- flat-bottomed rail — a rail having a cross section like an inverted T, with the top extremity enlarged slightly to form the head
- floating partition — a partition running parallel to and between two joists and resting on blocking between them.
- floating underflow — underflow
- floating-rate note — a eurobond, often issued as a negotiable bearer bond, that has a floating rate of interest
- flower arrangement — floral display
- flowers of sulphur — minute crystals of sulphur obtained by condensing sulphur vapour on a cold surface
- fluorescent screen — a transparent screen coated on one side with a phosphor that fluoresces when exposed to X-rays or cathode rays
- fluorodeoxyglucose — (carbohydrate) A fluorine analog of glucose that is used in positron emission tomography.
- football supporter — a person who supports a particular football team
- for good (and all) — for always; finally; permanently
- for the hell of it — the place or state of punishment of the wicked after death; the abode of evil and condemned spirits; Gehenna or Tartarus.
- for the life of me — If you say that you cannot for the life of you understand or remember something, you are emphasizing that you cannot understand or remember it, even if you try hard.
- forced development — the processing of underexposed photographic film to increase the image density
- forethoughtfulness — The condition of being forethoughtful.
- forget-me-not blue — a shade of blue similar to the shade of the flowers of a forget-me-not
- formal equivalence — the relation that holds between two open sentences when their universal closures are materially equivalent
- forward compatible — forward compatibility
- four-color problem — the problem, solved in 1976, of proving the theorem that any geographic map can be colored using only four colors so that no connected countries with a common boundary are colored the same color.
- four-legged friend — a four-legged animal, esp a dog
- fourth normal form — database normalisation
- fragile x syndrome — a widespread form of mental retardation caused by a faulty gene on the X chromosome.