12-letter words containing r, s, f
- sought-after — that is in demand; desirable: a sought-after speaker.
- south africa — Republic of, a country in S Africa; member of the Commonwealth of Nations until 1961. 472,000 sq. mi. (1,222,480 sq. km). Capitals: Pretoria and Cape Town.
- space-filler — a short article of little or no importance written to fill space in a magazine or newspaper
- spearfishing — any of several fishes of the genus Tetrapturus, resembling the sailfish but having the first dorsal fin much less developed: inhabiting all seas, but rare.
- spencer gulf — an inlet of the Indian Ocean in S Australia, between the Eyre and Yorke Peninsulas. Length: about 320 km (200 miles). Greatest width: about 145 km (90 miles)
- sportfishing — fishing with a rod and reel for sport, especially for saltwater sport fish from a motorboat.
- sprachgefuhl — a sensitivity to language, especially for what is grammatically or idiomatically acceptable in a given language.
- sprightfully — in a sprightful manner
- spring fever — a listless, lazy, or restless feeling commonly associated with the beginning of spring.
- square serif — a font of type having serifs with a weight equal to or greater than that of the main strokes. Compare Egyptian (def 5).
- square-faced — having a front shaped so as to be square or rectangular
- squirrelfish — any of several brightly colored, nocturnal fishes of the family Holocentridae, inhabiting shallow waters of tropical reefs, especially the reddish Holocentrus ascensionis of the West Indies, armed with sharp spines and scales.
- sr flip-flop — (hardware) (Or "RS flip-flop") A "set/reset" flip-flop in which activating the "S" input will switch it to one stable state and activating the "R" input will switch it to the other state. The outputs of a basic SR flip-flop change whenever its R or S inputs change appropriately. A clocked SR flip-flop has an extra clock input which enables or disables the other two inputs. When they are disabled the outputs remain constant. If we connect two clocked SR flip-flops so that the Q and /Q outputs of the first, "master" flip-flop drive the S and R inputs of the second, "slave" flip-flop, and we drive the slave's clock input with an inverted version of the master's clock, then we have an edge-triggered RS flip-flop. The external R and S inputs of this device are latched on one edge (transition) of the clock (e.g. the falling edge) and the outputs will only change on the next opposite (rising) edge. If both R and S inputs are active (when enabled), a race condition occurs and the outputs will be in an indeterminate state. A JK flip-flop avoids this possibility.
- stage fright — nervousness felt by a performer or speaker when appearing before an audience.
- stalactiform — resembling or shaped like a stalactite.
- stand in for — to substitute for
- stand up for — (of a person) to be in an upright position on the feet.
- stanniferous — containing tin; tin-bearing
- stark effect — Physics. (often lowercase) the splitting into two or more components of the spectral lines of atoms in an electric field.
- starter flat — a compact flat marketed by price and size specifications to suit the requirements of first-time home buyers
- state flower — a flower chosen as an official symbol of a U.S. state.
- state of war — a condition marked by armed conflict between or among states, existing whether or not war has been declared formally by any of the belligerents.
- stauffenberg — Claus (klaʊs), Graf von. 1907–44, German army officer, who tried to assassinate Hitler (1944). He and his fellow conspirators were executed
- steam fitter — a person who installs and repairs steampipes and their accessories.
- stelliferous — having or abounding with stars.
- stick figure — a diagrammatic drawing representing a human or animal, usually made with one line each for the torso and appendages, and often a circle for the head.
- stick up for — to pierce or puncture with something pointed, as a pin, dagger, or spear; stab: to stick one's finger with a needle.
- stormfulness — the quality or state of being stormful
- straight off — without a bend, angle, or curve; not curved; direct: a straight path.
- stratiformis — occurring in a very extensive horizontal layer.
- streamer fly — an artificial fly having a wing or wings extending beyond the crook of the fishhook.
- strike fault — a fault that trends parallel to the strike of the strata that it offsets.
- strike force — a military force armed and trained for attack.
- strobiliform — shaped as a strobilus
- strong force — Also called nuclear force. the short-range attractive force between baryons that holds together the nucleus of the atom.
- subfactorial — the number of ways a group of objects can be arranged so that none of the objects are in their original or correct place
- subfertility — below-average fertility
- subfeudatory — of or relating to subfeu
- subreference — a secondary reference
- sudoriferous — bearing or secreting sweat.
- suffruticose — woody at the base and herbaceous above.
- sugaring off — a sweet, crystalline substance, C 1 2 H 2 2 O 1 1 , obtained chiefly from the juice of the sugarcane and the sugar beet, and present in sorghum, maple sap, etc.: used extensively as an ingredient and flavoring of certain foods and as a fermenting agent in the manufacture of certain alcoholic beverages; sucrose. Compare beet sugar, cane sugar.
- sulfarsenide — any compound containing an arsenide and a sulfide.
- sulfonylurea — any of a group of oral drugs, as tolbutamide, that stimulate the pancreas to secrete more insulin, used to treat diabetes
- sulphur tuft — a poisonous basidiomycetous fungus, Hypholoma fasciculare, having a sulphurous yellow cap and found in clumps on and around broad-leaved trees
- superfrontal — a piece of cloth placed over an altar and frontal and hanging down a few inches over the front of the altar
- surf casting — the act, technique, or sport of fishing by casting from the shoreline into the sea, usually using heavy-duty tackle.
- surface area — the total area on the surface of a three-dimensional figure
- surface mail — the system, especially a government postal system, of sending mail by truck, train, or boat, as opposed to airmail.
- surface road — a road or street level with its surroundings: surface roads and elevated highways.