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21-letter words containing t, h, e, c, a

  • north atlantic treaty — the treaty (1949) signed by 12 countries, providing for the establishment of NATO.
  • north pacific current — a warm current flowing eastward across the Pacific Ocean.
  • not care a hang about — to not care the least bit about
  • old spanish practices — irregular practices among a group of workers to gain increased financial allowances, reduced working hours, etc
  • one-way hash function — (algorithm)   (Or "message digest function") A one-way function which takes a variable-length message and produces a fixed-length hash. Given the hash it is computationally infeasible to find a message with that hash; in fact one can't determine any usable information about a message with that hash, not even a single bit. For some one-way hash functions it's also computationally impossible to determine two messages which produce the same hash. A one-way hash function can be private or public, just like an encryption function. MD5, SHA and Snefru are examples of public one-way hash functions. A public one-way hash function can be used to speed up a public-key digital signature system. Rather than sign a long message, which can take a long time, compute the one-way hash of the message, and sign the hash.
  • orthogonal projection — a two-dimensional graphic representation of an object in which the projecting lines are at right angles to the plane of the projection. Also called orthogonal projection. Compare isometric (def 5).
  • orthogonal trajectory — the locus of a point whose path cuts each curve of a family of curves at right angles.
  • pacific daylight time — the version of Pacific Standard Time that is in use when daylight saving time is being observed
  • paper over the cracks — conceal flaws or problems
  • paper-white narcissus — a white-flowered variety of Narcissus tazetta, often forced for indoor bloom.
  • path coverage testing — (testing)   Testing a program by examining which lines of executable code are visited (as in code coverage testing) and also the ways of getting to each line of code and the subsequent sequence of execution. Path coverage testing is the most comprehensive type of testing that a test suite can provide. It can find more bugs, especially those that are caused by data coupling. However, path coverage is hard and usually only used for small and/or critical sections of code.
  • pathfinder prospectus — a prospectus regarding the flotation of a new company that contains only sufficient details to test the market reaction
  • phrase structure tree — Linguistics. a structural representation of a sentence in the form of an inverted tree, with each node of the tree labeled according to the phrasal constituent it represents.
  • phrase-structure rule — a rule that generates a sentence or other syntactic construction from words and phrases and identifies its constituent structure.
  • pipelined burst cache — Pipeline Burst Cache
  • play with a full deck — Nautical. a floorlike surface wholly or partially occupying one level of a hull, superstructure, or deckhouse, generally cambered, and often serving as a member for strengthening the structure of a vessel. the space between such a surface and the next such surface above: Our stateroom was on B deck.
  • polygenic inheritance — the heredity of complex characters that are determined by a large number of genes, each one usually having a relatively small effect.
  • potassium thiocyanate — a colorless, crystalline, hygroscopic, water-soluble solid, KSCN, used chiefly in the manufacture of chemicals, dyes, and drugs.
  • primary sex character — any of the body structures directly concerned in reproduction, as the testes, ovaries, and external genitalia.
  • profit-sharing scheme — a scheme employing profit-sharing; a system in which a portion of the net profit of a business is distributed to its employees, usually in proportion to their wages or their length of service
  • programmed cell death — a normal, genetically regulated process leading to the death of cells and triggered by the presence or absence of certain stimuli, as DNA damage.
  • protestant work ethic — work ethic.
  • psychopathic disorder — (in England, according to the Mental Health Act 1983) a persistent disorder or disability of mind which results in abnormally aggressive or seriously irresponsible conduct on the part of the person concerned
  • psychopharmacotherapy — the use of psychoactive drugs in the symptomatic treatment or control of mental disorders or psychiatric disease.
  • public health service — the agency that is responsible for the health of the general public
  • purchasing department — the group of staff within an organization that is responsible for buying goods or products
  • push the panic button — an alarm button for use in an emergency, as to summon help.
  • put sb in their place — If you put someone in their place, you show them that they are less important or clever than they think they are.
  • rap over the knuckles — to reprimand
  • 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
  • record of achievement — a statement of the personal and educational development of each pupil
  • rectangular hyperbola — a hyperbola with perpendicular asymptotes
  • rehabilitation centre — a centre or clinic where people with an alcohol or drug addiction are treated
  • reinforcement therapy — a behavior modification technique in which appropriate behavior is strengthened through systematic reinforcement.
  • 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.
  • reverberation chamber — a room with walls that reflect sound. It is used to make acoustic measurements and as a source of reverberant sound to be mixed with direct sound for recording or broadcasting
  • ring down the curtain — to lower the curtain at the end of a theatrical performance
  • 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.
  • satisficing behaviour — the form of behaviour demonstrated by firms who seek satisfactory profits and satisfactory growth rather than maximum profits
  • scarce as hen's teeth — extremely rare
  • schema definition set — (SDS) Something in Portable Common Tool Environment.
  • schlieren photography — a type of photography which records schlieren
  • 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.
  • second-hand endowment — A second-hand endowment is a traditional with-profits endowment policy that has been sold to a new owner part way through its term.
  • secure hash algorithm —
  • self-characterization — portrayal; description: the actor's characterization of a politician.
  • 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.
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