21-letter words containing o, r, i, n, d, s

reading comprehension — a text that students use to help them improve their reading skills, by reading it and answering questions relating to the text. Sometimes used as a test or examination of reading skills. A reading comprehension can be in the student's own or another language
registration document — a document giving identification details of a motor vehicle, including its manufacturer, date of registration, engine and chassis numbers, and owner's name
resident commissioner — a representative from a dependency, as Guam or Puerto Rico, who is entitled to speak, but not to vote, in the U.S. House of Representatives.
residual unemployment — the unemployment that remains in periods of full employment, as a result of those mentally, physically, or emotionally unfit to work
revillagigedo islands — an uninhabited island group belonging to Mexico, in the Pacific Ocean, SSW of the Baja California peninsula: Socorro is the largest island. 320 sq. mi. (830 sq. km).
ring-around-the-rosey — a children's game in which the players sing while going around in a circle and squat when the lyrics “all fall down” are sung.
rutherford scattering — the scattering of an alpha particle through a large angle with respect to the original direction of motion of the particle, caused by an atom (Rutherford atom) with most of the mass and all of the positive electric charge concentrated at a center or nucleus.
s-k reduction machine — An abstract machine defined by Professor David Turner to evaluate combinator expressions represented as binary graphs. Named after the two basic combinators, S and K.
saint-maur-des-fosses — a town in N central France, near Paris, on the Marne River.
sampling distribution — the distribution of a statistic based on all possible random samples that can be drawn from a given population.
sanitation department — the department of local government responsible for collecting and disposing of refuse
sao tome and principe — Democratic Republic of, a republic in W Africa, comprising the islands of São Tomé and Príncipe, in the Gulf of Guinea, N of the equator: a former overseas province of Portugal; gained independence in 1975. 372 sq. mi. (964 sq. km). Capital: São Tomé.
school superintendent — an official whose job is to oversee school administration within a district
science correspondent — a newspaper or television journalist who specializes in reporting on new discoveries in science
secondary containment — Secondary containment is a system for dealing with hazardous spills.
serbia and montenegro — a former country in SE Europe, consisting of the republics of Serbia and Montenegro; replaced the Federal Republic of Yugoslavia in 2003, and dissolved in 2006 following Montenegro’s decision to secede
set the world on fire — the earth or globe, considered as a planet.
sheppard's correction — a method of correcting the bias in standard deviations and higher moments of distributions that arises from grouping values of the variable.
sierra madre oriental — the system of mountains in the east of Mexico
silicon tetrachloride — a colorless, fuming liquid, SiCl 4 , used chiefly for making smoke screens and various derivatives of silicon.
silicon tetrafluoride — a colorless, fuming gas, SiF 4 , used chiefly in the manufacture of fluosilicic acid.
sinusoidal projection — an equal-area projection in which parallels are straight lines spaced at regular intervals, the central meridian is a straight line one-half the length of the equator, and the other meridians are curves symmetrical to the central meridian.
skop, skiet en donder — violent action and melodramatic adventure in a film
snr bandwidth product — (communications) The integral of the SNR over frequency. The SNR bandwidth product is an important limit in the capacity of a communication channel.
social administration — the administration and maintenance of issues to do with social policies and welfare
somatization disorder — a mental illness, usually beginning before age 20, characterized by multiple physical complaints for which no physical causes can be found and often leading to unnecessary treatment or surgery and to severe disability.
sovereign wealth fund — an investment fund created using the financial assets of a national government
special correspondent — a journalist who covers stories firsthand from a war zone
spherical coordinates — Usually, spherical coordinates. any of three coordinates used to locate a point in space by the length of its radius vector and the angles this vector makes with two perpendicular polar planes.
statutory declaration — a declaration made under statutory authority before a justice of the peace or commissioner for oaths which may in certain cases be substituted for a statement on oath
stock list department — (in an American stock exchange) the department dealing with monitoring compliance with its listing requirements and rules
strategic air command — a U.S. Air Force command charged with intercontinental air strikes, especially nuclear attacks.
student participation — the extent to which students participate or involve themselves in a class, course, etc
suction and curettage — a technique involving extraction of the fetus through a suction tube, used to perform abortions during the early stages of pregnancy.
surface friction drag — the part of the drag on a body moving through a fluid that is dependent on the nature of the surface of the body
synchronized shifting — gear shifting in which the gears to be meshed are made to rotate at the same speed.
synchronized swimming — a sport growing out of water ballet in which swimmers, in solo, duet, and team efforts, complete various required figures by performing motions in relatively stationary positions, along with a freestyle competition, with the contestants synchronizing movements to music and being judged for body position, control, and the degree of difficulty of the moves.
synchrotron radiation — electromagnetic radiation emitted by charged particles as they pass through magnetic fields.
terrestrial radiation — long-wave electromagnetic radiation in the form of heat emitted from the earth's surface and atmosphere.
the oldest profession — prostitution
thermal decomposition — Thermal decomposition is the process in which a chemical species breaks down when its temperature is increased.
to be arrayed against — to be opposed to
to be in dire straits — to be in a position of acute difficulty
to risk life and limb — If someone risks life and limb, they do something very dangerous that may cause them to die or be seriously injured.
to stick in your mind — If something sticks in your mind, it remains firmly in your memory.
trades union congress — The Trades Union Congress in Britain is the same as the TUC.
universal disk format — (storage, standard) (UDF) A CD-ROM file system standard that is required for DVD ROMs. UDF is the OSTA's replacement for the ISO 9660 file system used on CD-ROMs, but will be mostly used on DVD. DVD multimedia disks use UDF to contain MPEG audio and video streams. To read DVDs you need a DVD drive, the kernel driver for the drive, MPEG video support, and a UDF driver. DVDs containing both UDF filesystems and ISO 9660 filesystems can be read without UDF support. UDF can also be used by CD-R and CD-RW recorders in packet writing mode.
universe of discourse — the totality of known or supposed objects and phenomena throughout space; the cosmos; macrocosm.
university of iceland — (body, education) The Home of Fjolnir.
ventriloquist's dummy — a puppet which is operated by a ventriloquist and made to appear to talk

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