21-letter words containing a, g, r, i, o

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
replacement algorithm — The method used to determine which entry in an associative cache to flush to main memory when it is desired to cache a new block of data. The "least recently used" algorithm flushed the block which has not been accessed for the longest time. A random replacement algorithm picks any block with equal probability.
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 down the curtain — to lower the curtain at the end of a theatrical performance
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.
rolling in the aisles — (of an audience) overcome with laughter
roodepoort-maraisburg — a city in S Transvaal, in the NE Republic of South Africa.
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.
salam-weinberg theory — the electroweak theory.
sampling distribution — the distribution of a statistic based on all possible random samples that can be drawn from a given population.
san gabriel mountains — a mountain range in S California, N of Los Angeles. Highest peak, San Antonio Peak, 10,080 feet (3072 meters).
san gorgonio mountain — a mountain in S California: highest peak in the San Bernardino Mountains. 11,502 feet (3506 meters).
satisficing behaviour — the form of behaviour demonstrated by firms who seek satisfactory profits and satisfactory growth rather than maximum profits
saving your reverence — a form of apology for using an obscene or taboo expression
schlieren photography — a type of photography which records schlieren
secure hash algorithm —
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
short message service — (messaging) (SMS) A message service offered by the GSM digital mobile telephone system. Using SMS, a short alphanumeric message (160 alphanumeric characters) can be sent to a mobile phone to be displayed there, much like in an alphanumeric pager system. The message is buffered by the GSM network until the phone becomes active.
signal-to-noise ratio — the ratio of one parameter, such as power of a wanted signal to the same parameter of the noise at a specified point in an electronic circuit, etc
simple actor language — (language) (SAL) A minimal actor language, used for teaching in:
single spanish burton — a tackle having a runner as well as the fall supporting the load, giving a mechanical advantage of three, neglecting friction.
siren call/siren song — A siren call or siren song is the appeal that something has although it is harmful or dangerous.
snap one's fingers at — any of the terminal members of the hand, especially one other than the thumb.
social anthropologist — an anthropologist who deals with cultural and social phenomena such as kinship systems or beliefs, esp of nonliterate peoples
sovereign wealth fund — an investment fund created using the financial assets of a national government
spark ignition engine — A spark ignition engine is an engine running on the Otto cycle.
spin angular momentum — to make (yarn) by drawing out, twisting, and winding fibers: Pioneer women spun yarn on spinning wheels.
strategic air command — a U.S. Air Force command charged with intercontinental air strikes, especially nuclear attacks.
suction and curettage — a technique involving extraction of the fetus through a suction tube, used to perform abortions during the early stages of pregnancy.
supergranulation cell — one of a number of large convection cells in the photosphere and chromosphere of the sun, each having a diameter of 10,000–20,000 miles (16,000–32,000 km) and lasting longer than a day.
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
take one's finger out — stop delaying or procrastinating
tape operating system — (operating system) (TOS) An IBM operating system for System 360, used in the early days around 1965 to support the IBM 360 model 30 et al. TOS was a predecessor to IBM's Disk Operating System. TOS died out really early as disks such as the 2311 and 2314 became common with the IBM 360 whereas thet had been a real luxury on the IBM 7090.
teleological argument — the argument purporting to prove the existence of God from empirical facts, the premise being that the universe shows evidence of order and hence design
the acting profession — actors considered as a group
the moral high ground — If you say that someone has taken the moral high ground, you mean that they consider that their policies and actions are morally superior to the policies and actions of their rivals.
the rock of gibraltar — a limestone promontory at the tip of S Spain
the shipping forecast — a radio broadcast made by the BBC of weather reports and forecasts for the seas around the British Isles
threatening behaviour — intimidation or intentional behaviour that causes another person to fear injury or harm
threshold wage policy — a policy whereby wages are increased in accordance with inflation
tide-generating force — the difference between the force of gravity exerted by the moon or the sun on a particle of water in the ocean and that exerted on an equal mass of matter at the centre of the earth. The lunar tide-generating forces are about 2.2 times greater than are the solar ones
to be arrayed against — to be opposed to
to get into high gear — if people or an activity go into high gear, moves into high gear, etc, people do what they were doing more intensely, or the activity becomes more intense
to have green fingers — If someone has green fingers, they are very good at gardening and their plants grow well.
to kill a mockingbird — a novel (1960) by Harper Lee.
to lay something bare — If you lay something bare, you uncover it completely so that it can then be seen.
to rear its ugly head — If something unpleasant rears its head or rears its ugly head, it becomes visible or noticeable.
to take the high road — to take the course of action which is safest and most familiar
topological invariant — a property of a topological space that is a property of every space related to the given space by a homeomorphism.
trades union congress — The Trades Union Congress in Britain is the same as the TUC.

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