13-letter words starting with r
- rainbow trout — a trout, Salmo gairdnerii, native in the coastal waters and streams from Baja California to Alaska, used as a food and game fish.
- raising agent — in baking, a substance added to dough to make it rise
- raising plate — wall plate (def 1).
- raison d'etat — a purely political reason for governmental action, based on the national interest and often violating principles of justice.
- raison d'etre — reason or justification for being or existence: Art is the artist's raison d'être.
- raking course — a concealed course of bricks laid diagonally to the wall surface in a raking bond.
- rally driving — the sport of taking part in motor rallies
- ramapithecine — of or relating to an extinct hominoid of the genus Ramapithecus
- rambling club — a club for people who enjoy taking walks in the country
- rambling rose — any of various cultivated hybrid roses that straggle over other vegetation
- ramifications — the act or process of ramifying.
- ramon y cajal — Santiago [sahn-tyah-gaw] /sɑnˈtyɑ gɔ/ (Show IPA), 1852–1934, Spanish histologist: Nobel Prize in medicine 1906.
- random access — designating or of a volatile memory that allows data to be accessed directly and does not require following a sequence of storage locations
- random number — pseudorandom number
- random rubble — masonry in which untooled stones are set without coursing
- random sample — a statistical sample that is devised to avoid interference so that its distribution is affected only by, and so can be held to represent, that of the whole population
- random-access — direct-access.
- randomization — to order or select in a random manner, as in a sample or experiment, especially in order to reduce bias and interference caused by irrelevant variables; make random.
- rank and file — the members of a group or organization apart from its leaders or officers.
- rankine cycle — the hypothetical cycle of a steam engine in which all heat transfers take place at constant pressure and in which expansion and compression occur adiabatically.
- rankine scale — William John Macquorn [muh-kwawrn] /məˈkwɔrn/ (Show IPA), 1820–70, Scottish engineer and physicist.
- rann of kutch — an extensive salt waste in W central India, and S Pakistan: consists of the Great Rann in the north and the Little Rann in the southeast; seasonal alternation between marsh and desert; some saltworks. In 1968 an international tribunal awarded about 10 per cent of the border area to Pakistan. Area: 23 000 sq km (9000 sq miles)
- rapid transit — a system of public transportation in a metropolitan area, usually a subway or elevated train system.
- rapprochement — an establishment or reestablishment of harmonious relations: a rapprochement reached between warring factions.
- raspberry jam — jam made using raspberries
- rat claw foot — an elongated foot having the form of a thin claw grasping a ball.
- rat-a-tat-tat — a sound of knocking or rapping: a sharp rat-a-tat on the window.
- rat-tail file — a long, narrow file having a circular cross section.
- ratable value — (formerly) a fixed value assigned to a property by a local authority, on the basis of which variable annual rates are charged
- ratbite fever — either of two relapsing febrile diseases, widely distributed geographically, caused by infection with Streptobacillus moniliformis or Spirillum minor and transmitted by rats.
- ratchet wheel — a wheel, with teeth on the edge, into which a pawl drops or catches, as to prevent reversal of motion or convert reciprocating motion into rotatory motion.
- ratiocination — the process of logical reasoning.
- ratiocinative — the process of logical reasoning.
- ration coupon — a coupon that can be exchanged for a certain quantity of rationed goods
- rational form — a quotient of two polynomials with integral coefficients.
- rationalistic — the principle or habit of accepting reason as the supreme authority in matters of opinion, belief, or conduct.
- rattle around — If you say that someone rattles around in a room or other space, you mean that the space is too large for them.
- rattlebrained — foolish; flighty; scatterbrained.
- ratushinskaya — Irina (ɪˈriːnə). born 1954, Russian poet and writer: imprisoned (1983–86) in a Soviet labour camp on charges of subversion. Her publications include Poems (1984), Grey is the Colour of Hope (1988), and The Odessans (1992)
- rauschenbusch — Walter, 1861–1918, U.S. clergyman and social reformer.
- raw materials — Raw materials are materials that are in their natural state, before they are processed or used in manufacturing.
- ray tomlinson — (person) An engineer at Bolt Beranek and Newman who, in July 1972 while designing the first[?] electronic mail program, chose the commercial at symbol "@" to separate the user name from the computer name.
- rayleigh disc — a small light disc suspended in the path of a sound wave, used to measure the intensity of the sound by analysing the resulting deflection of the disc
- rayleigh disk — a small circular disk, usually of mica, that is suspended from a fiber and tends to be deflected at right angles to a stream of air, indicating by its deflection the intensity of a sound wave.
- rayleigh wave — a wave along the surface of a solid, elastic body, especially along the surface of the earth.
- razzle-dazzle — showiness, brilliance, or virtuosity in technique or effect, often without concomitant substance or worth; flashy theatricality: The razzle-dazzle of the essay's metaphors cannot disguise its shallowness of thought.
- re-absorption — resorption (def 2).
- re-accelerate — to cause faster or greater activity, development, progress, advancement, etc., in: to accelerate economic growth.
- re-acceptance — the act of taking or receiving something offered.
- re-activation — to render active again; revive.