15-letter words containing i, s, l
- fluorochemicals — Plural form of fluorochemical.
- flying buttress — a segmental arch transmitting an outward and downward thrust to a solid buttress that through its inertia transforms the thrust into a vertical one.
- flying fortress — a heavy bomber, the B-17, with four radial piston engines, widely used over Europe and the Mediterranean by the U.S. Air Force in World War II.
- flying squirrel — any of various nocturnal tree squirrels, as Glaucomys volans, of the eastern U.S., having folds of skin connecting the fore and hind legs, permitting long, gliding leaps.
- follow-up visit — a visit made as a follow-up to an initial visit
- fool's paradise — a state of enjoyment based on false beliefs or hopes; a state of illusory happiness.
- formation rules — the set of rules that specify the syntax of a formal system; the algorithm that generates the well-formed formulae
- foundationalism — (epistemology) The doctrine that beliefs derive justification from certain basic beliefs.
- fovea centralis — a small pit or depression at the back of the retina forming the point of sharpest vision.
- franklin square — a town on W Long Island, in SE New York.
- franklin's gull — a black-headed North American gull, Larus pipixcan, feeding chiefly on insects.
- fraternal twins — one of a pair of twins, not necessarily resembling each other, or of the same sex, that develop from two separately fertilized ova.
- free soil party — a former U.S. political party (1848–56) that opposed the extension of slavery in the Territories not yet admitted to statehood.
- fresnel biprism — biprism.
- fresnel mirrors — two plane mirrors so linked that a beam of light falling on them is reflected in slightly different directions, thus producing interference fringes in the area where this reflected light overlaps
- friar's lantern — ignis fatuus (def 1).
- fringe festival — an unofficial, often unconventional, arts festival that is associated with another, larger festival
- frisian islands — a chain of islands in the North Sea along the coasts of the Netherlands, Germany, and Denmark: separated from the mainland by shallows
- fulfill oneself — to realize completely one's ambitions, potentialities, etc.
- fully fashioned — (of stockings, knitwear, etc) shaped and seamed so as to fit closely
- functionalistic — of or relating to a function or functions: functional difficulties in the administration.
- functionalities — of or relating to a function or functions: functional difficulties in the administration.
- fundamentalists — Plural form of fundamentalist.
- funeral service — ceremony at a burial or cremation
- fungistatically — in a fungistatic manner
- fusospirillosis — (medicine) alternative name of acute necrotizing ulcerative gingivitis.
- fusospirochetal — Relating to fusospirochetes.
- futilitarianism — The belief that all human activity is futile.
- gallant soldier — a South American plant, Galinsoga parviflora, widely distributed as a weed, having small daisy-like flowers surrounded by silvery scales: family Asteraceae (composites)
- galloping-ghost — Harold ("Red"; "the Galloping Ghost") 1903–1991, U.S. football player.
- gambier islands — a group of islands in the S Pacific Ocean, in French Polynesia. Chief settlement: Rikitéa. Pop: 1097 (2002). Area: 30 sq km (11 sq miles)
- gambling losses — money lost as a result of playing games of chance for money
- gardening tools — tools used for gardening, such as a trowel, spade, rake, etc
- gas oil contact — In a reservoir, gas oil contact is the area containing a mix of gas and oil, below which there is mainly oil and above which there is mainly gas.
- gaspe peninsula — a peninsula in SE Canada, in Quebec province, between New Brunswick and the St. Lawrence River.
- gastric balloon — an inflatable rubber bag placed in the stomach to reduce its capacity as an aid to losing weight
- gastronomically — the art or science of good eating.
- gender politics — debate about the roles and relations of men and women
- general paresis — a syphilitic brain disorder characterized by chronic inflammation and degeneration of cerebral tissue resulting in mental and physical deterioration.
- general science — basic science taught as a school subject
- general studies — a school subject that includes a variety of skills and topics (such as comprehension, and current affairs, which may complement the study of A-levels in specific subjects)
- generalisations — Plural form of generalisation.
- generalizations — Plural form of generalization.
- gentlemanliness — like, befitting, or characteristic of a gentleman.
- geochronologist — A geologist whose speciality is geochronology.
- geomorphologist — A geologist whose speciality is geomorphology.
- geostrophically — By means of, or in terms of, geostrophy.
- gesneria family — the plant family Gesneriaceae, characterized by herbaceous plants having a basal rosette of usually toothed leaves, tubular two-lipped flowers, and fruit in the form of a berry or capsule, and including the African violet, gloxinia, and streptocarpus.
- giant sunflower — a composite plant, Helianthus giganteus, of eastern North America, growing nearly 12 feet (4 meters) high and having very large yellow flower heads.
- gibson, william — William Gibson