19-letter words containing a, f, e, c, t, i
- presumption of fact — a presumption based on experience or knowledge of the relationship between a known fact and a fact inferred from it.
- private first class — a soldier ranking above a private and below a corporal or specialist fourth class in the U.S. Army, and above a private and below a lance corporal in the U.S. Marine Corps.
- radioactive fallout — the settling to the ground of airborne particles ejected into the atmosphere from the earth by explosions, eruptions, forest fires, etc., especially such settling from nuclear explosions (radioactive fallout) Compare rainout.
- radius of curvature — the absolute value of the reciprocal of the curvature at a point on a curve.
- reciprocity failure — a failure of the two exposure variables, light intensity and exposure time, to behave in a reciprocal fashion at very high or very low values
- republic of vietnam — the name (from 1955–75) for South Vietnam, as an independent republic, following the division of the country in 1954 into North Vietnam and South Vietnam
- reticular formation — a network of neurons in the brainstem involved in consciousness, regulation of breathing, the transmission of sensory stimuli to higher brain centers, and the constantly shifting muscular activity that supports the body against gravity.
- sacrifice operative — a euphemistic term for a suicide bomber
- savings certificate — a certificate of deposit for a specific sum of money in a savings account, especially a deposit for a fixed term at a specified interest rate.
- scientific notation — a method for expressing a given quantity as a number having significant digits necessary for a specified degree of accuracy, multiplied by 10 to the appropriate power, as 1385.62 written as 1.386 × 10 3 .
- secondary infection — an infection resulting from another infection
- self identification — identification of oneself with some other person or thing.
- self-congratulating — the expression or feeling of uncritical satisfaction with oneself or one's own accomplishment, good fortune, etc.; complacency.
- self-congratulation — the expression or feeling of uncritical satisfaction with oneself or one's own accomplishment, good fortune, etc.; complacency.
- self-discrimination — an act or instance of discriminating, or of making a distinction.
- self-identification — identification of oneself with some other person or thing.
- sentential function — an expression that contains one or more variables and becomes meaningful when suitable constant terms are substituted for them.
- shopping facilities — shops or other retail services
- siberian forest cat — a breed of powerfully-built long-haired cat, typically tabby with a white ruff and white paws
- significant figures — the figures of a number that express a magnitude to a specified degree of accuracy, rounding up or down the final figure
- son-of-a-bitch stew — (in the Old West) a stew often prepared by chuck-wagon cooks for working cowboys, containing tripe and often also the heart, liver, brains, kidney, etc., of a slaughtered steer.
- south pacific ocean — the part of the Pacific Ocean extending S from the Equator to the Antarctic continent.
- spanish west africa — a former overseas territory of Spain in NW Africa: divided in 1958 into the overseas provinces of Ifni and Spanish Sahara
- specific characters — the persistent features that distinguish one species from all others
- specific resistance — resistivity (def 2).
- specific-resistance — the power or property of resistance.
- specular reflection — Specular reflection is reflection of heat or light in which the angles of different parts of the surface are important.
- speculative fiction — a broad literary genre encompassing any fiction with supernatural, fantastical, or futuristic elements
- subsistence farming — farming whose products are intended to provide for the basic needs of the farmer, with little surplus for marketing.
- supercritical fluid — A supercritical fluid is a fluid at a temperature and pressure at which there is no difference between liquid and gas.
- surface effect ship — a large, ship-size air cushion vehicle operated over water.
- switchblade (knife) — a large jackknife that snaps open when a release button on the handle is pressed
- teaching fellowship — a fellowship providing a student in a graduate school with free tuition and expenses and stipulating that the student assume some teaching duties in return.
- term life insurance — life insurance for which premiums are paid over a limited time and that covers a specific term, the face value payable only if death occurs within that term.
- the disenfranchised — people who are deprived of the right to vote or other rights of citizenship
- the oceanic feeling — a term coined by Sigmund Freud to describe the feeling experienced by people who have religious faith
- the patriotic front — a political party in Zimbabwe, founded in 2001 as a coalition of two communist parties, the Zimbabwe African Peoples Union (ZAPU) and the Zimbabwe African National Union (ZANU), which had worked together to fight against White minority rule in Rhodesia
- ticket-of-leave man — (formerly in Britain) a convict who had a permit to leave prison, after serving only part of his sentence, with certain restrictions placed on him
- to this/that effect — You use to this effect, to that effect, or to the effect that to indicate that you have given or are giving a summary of something that was said or written, and not the actual words used.
- traffic engineering — a branch of civil engineering concerned with the design and construction of streets and roads that will best facilitate traffic movement.
- traffic regulations — rules designed to expedite the flow of traffic and prevent collisions
- transesterification — a reaction between an ester of one alcohol and a second alcohol to form an ester of the second alcohol and an alcohol from the original ester, as that of methyl acetate and ethyl alcohol to form ethyl acetate and methyl alcohol; interesterification.
- tricks of the trade — expert techniques
- trifacial neuralgia — tic douloureux.
- ultrahigh frequency — any frequency between 300 and 3000 megahertz. Abbreviation: UHF, uhf.