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21-letter words containing a, l, h, o, t

  • pull sth out of a hat — To pull something out of the hat means to do something unexpected which helps you to succeed, often when you are failing.
  • ralph roister doister — a play (1553?) by Nicholas Udall: the earliest known English comedy.
  • rap over the knuckles — to reprimand
  • rayleigh distribution — (mathematics)   A curve that yields a good approximation to the actual labour curves on software projects.
  • reciprocal inhibition — the theory that the pairing of an anxiety-provoking stimulus with anxiety-reducing reactions will weaken the association between the stimulus and the anxiety.
  • reconnaissance flight — a flight made by an aircraft in order to obtain military information about a particular place
  • rectangular hyperbola — a hyperbola with perpendicular asymptotes
  • rehabilitation centre — a centre or clinic where people with an alcohol or drug addiction are treated
  • 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.
  • reverse polish syntax — postfix notation
  • rolling in the aisles — (of an audience) overcome with laughter
  • roman catholic church — the Christian church of which the pope, or bishop of Rome, is the supreme head.
  • safe in the knowledge — If you do something safe in the knowledge that something else is the case, you do the first thing confidently because you are sure of the second thing.
  • salam-weinberg theory — the electroweak theory.
  • schlieren photography — a type of photography which records schlieren
  • scholastic philosophy — the system of philosophy, theology, and teaching that dominated medieval western Europe and was based on the writings of the Church Fathers and (from the 12th century) Aristotle, the Greek philosopher (384–322 bc)
  • scorched earth policy — a military practice of devastating the property and agriculture of an area before abandoning it to an advancing enemy.
  • scorched-earth policy — a military practice of devastating the property and agriculture of an area before abandoning it to an advancing enemy.
  • secure hash algorithm —
  • self-characterization — portrayal; description: the actor's characterization of a politician.
  • settle someone's hash — a dish of diced or chopped meat and often vegetables, as of leftover corned beef or veal and potatoes, sautéed in a frying pan or of meat, potatoes, and carrots cooked together in gravy.
  • silicon tetrachloride — a colorless, fuming liquid, SiCl 4 , used chiefly for making smoke screens and various derivatives of silicon.
  • single spanish burton — a tackle having a runner as well as the fall supporting the load, giving a mechanical advantage of three, neglecting friction.
  • skeleton at the feast — a person or event that brings gloom or sadness to an occasion of joy or celebration
  • social anthropologist — an anthropologist who deals with cultural and social phenomena such as kinship systems or beliefs, esp of nonliterate peoples
  • sodium metabisulphite — an inorganic compound with the chemical formula Na2S2O5 that is used as a preservative, antioxidant and disinfectant
  • sovereign wealth fund — an investment fund created using the financial assets of a national government
  • space shuttle orbiter — orbiter (def 1).
  • 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.
  • spicebush swallowtail — a swallowtail butterfly, Papilio troilus, having a dark body with yellow spots on the forewings and greenish hind wings.
  • spotted alfalfa aphid — a pale yellowish aphid, Therioaphis maculata, of the southern U.S., especially west of the Mississippi River, that is marked with black spots and has fine spines on its back: a pest mainly of alfalfa and some other legumes, as clover.
  • steal someone's heart — to cause someone to feel love or affection
  • steer clear of sb/sth — If you steer clear of someone or something, you deliberately avoid them.
  • structural psychology — psychology centering on the analysis of the structure or content of conscious mental states by introspective methods.
  • sunday school teacher — someone who teaches at a Sunday school
  • take sb/sth seriously — If you take someone or something seriously, you believe that they are important and deserve attention.
  • tartarian honeysuckle — an Asian honeysuckle, Lonicera tatarica, having fragrant, white to pink flowers.
  • the antipodes islands — a group of small uninhabited islands in the South Pacific, southeast of and belonging to New Zealand. Area: 62 sq km (24 sq miles)
  • the apple of your eye — If you say that someone is the apple of your eye, you mean that they are very important to you and you are extremely fond of them.
  • the barber of seville — Italian Il barbiere di Siviglia. a comic opera (1816) by Gioacchino Rossini based on a comedy (1775) by Beaumarchais.
  • the battle of britain — from August to October 1940, the prolonged bombing of S England by the German Luftwaffe and the successful resistance by the RAF Fighter Command, which put an end to the German plan of invading Britain
  • the central provinces — the Canadian provinces of Ontario and Quebec
  • the fall of the cards — the chance distribution of cards in a given deal
  • the household cavalry — a group of British soldiers on horseback who have the job of protecting the king or queen and their family
  • the letter of the law — If you say that someone keeps to the letter of the law , you mean that they act according to what is actually written in the law, rather than according to the general principles of it, especially when you disapprove of this.
  • the lower vertebrates — relatively simple and primitive vertebrates
  • 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 royal scots greys — (formerly) a British cavalry regiment, the Second Dragoons
  • the women's land army — a unit of women recruited to do agricultural work in the United Kingdom during World War I and World War II
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