20-letter words containing a, i, r, l, f, t
- potential difference — voltage
- prefecture apostolic — a territory in the early stage of missionary development.
- probability function — the function the values of which are probabilities of the distinct outcomes of a discrete random variable
- quantum field theory — any theory in which fields are treated by the methods of quantum mechanics; each field can then be regarded as consisting of particles of a particular kind, which may be created and annihilated.
- refracting telescope — an optical instrument for making distant objects appear larger and therefore nearer. One of the two principal forms (refracting telescope) consists essentially of an objective lens set into one end of a tube and an adjustable eyepiece or combination of lenses set into the other end of a tube that slides into the first and through which the enlarged object is viewed directly; the other form (reflecting telescope) has a concave mirror that gathers light from the object and focuses it into an adjustable eyepiece or combination of lenses through which the reflection of the object is enlarged and viewed. Compare radio telescope.
- refuse disposal unit — a unit or part of a sink that disposes of waste food, etc, by grinding
- ring wall foundation — A ring wall foundation is a base made of concrete, used to put large tanks on.
- royal air force list — an official list of all serving commissioned officers of the RAF and reserve officers liable for recall
- self-differentiating — to form or mark differently from other such things; distinguish.
- sergeant first class — a noncommissioned officer ranking next above a staff sergeant and below a first or master sergeant.
- small craft advisory — a U.S. National Weather Service advisory of sustained winds, over coastal and inland waters, with speeds of 20–33 knots (23–38 mph, 10–17 m/sec). Regional NWS offices have discretion over the choice of the lower limit.
- snowflake generation — the generation of people who became adults in the 2010s, viewed as being less resilient and more prone to taking offence than previous generations
- sodium fluoroacetate — a white, amorphous, water-soluble, poisonous powder, C 2 H 2 FO 2 Na, used as a rodenticide.
- solitary confinement — the confinement of a prisoner in a cell or other place in which he or she is completely isolated from others.
- the legal profession — the profession of law
- theory of relativity — relativity (def 2).
- there is no call for — If you say that there is no call for someone to behave in a particular way, you are criticizing their behaviour, usually because you think it is rude.
- theresa of avila, st — Saint. Also, Teresa. Also called Theresa of Avila [ah-vee-lah] /ˈɑ viˌlɑ/ (Show IPA), 1515–82, Spanish Carmelite nun, mystic, and writer.
- to burst into flames — If something bursts into flames or bursts into flame, it suddenly starts burning strongly.
- treaty of versailles — the treaty of 1919 imposed upon Germany by the Allies (except for the US and the Soviet Union): the most important of the five peace treaties that concluded World War I
- universal quantifier — a quantifier indicating that the sentential function within its scope is true for all values of any variable included in the quantifier.
- upper yosemite falls — a section of Yosemite Falls in central California, in the Yosemite National Park that is 436 m (1430 ft) high
- vertical lift bridge — lift bridge.
- walk-in refrigerator — a refrigerated storage room, as at a butcher shop.
- war of the rebellion — American Civil War.
- wardrobe malfunction — an embarrassing situation caused by the clothes a person is wearing
- warehouse facilities — places for storing goods
- with a grain of salt — to season with salt.
- working-capital fund — a fund established to finance operating activities in an industrial enterprise.