17-letter words containing f, i, s, u, r, a
- south west africa — a former name of Namibia.
- south-west africa — a former name of Namibia.
- spatial frequency — the measure of fine detail in an optical image in terms of cycles per millimetre
- standard function — a subprogram provided by a translator that carries out a task, for example the computation of a mathematical function, such as sine, square root, etc
- stannous fluoride — a white, crystalline powder, SnF 2 , slightly soluble in water: used as a source of fluorine in the prevention of dental caries, especially as a toothpaste additive.
- statue of liberty — a large copper statue, on Liberty Island, in New York harbor, depicting a woman holding a burning torch: designed by F. A. Bartholdi and presented to the U.S. by France; unveiled 1886.
- strike-slip fault — a geological fault on which the movement is along the strike of the fault
- sufficient reason — the principle that nothing happens by pure chance, but that an explanation must always be available
- supreme sacrifice — the sacrifice of one's own life: Many made the supreme sacrifice during the war.
- the carboniferous — the Carboniferous period or rock system
- thermal diffusion — the separation of constituents, often isotopes, of a fluid under the influence of a temperature gradient.
- thiosulfuric acid — an acid, H 2 S 2 O 3 , that may be regarded as sulfuric acid with one oxygen atom replaced by sulfur.
- thuringian forest — a forested mountain region in central Germany: a resort area.
- transfer function — The transfer function of a circuit is the ratio of the response to the input.
- unclassified road — a road that has not been given a grade because it is of a basic standard
- uniformitarianism — supporting, conforming to, or derived from a theory or doctrine about uniformity, especially on the subject of geology.
- unofficial strike — a strike that is not approved by the strikers' trade union
- unprofessionalism — not professional; not pertaining to or characteristic of a profession.
- year of confusion — (in ancient Rome) the year of 445 days preceding the introduction, in 46 b.c., of the Julian calendar: lengthened to compensate for the cumulative errors of the Roman calendar.