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21-letter words containing r, h, o, e, a

  • central limit theorem — any of several theorems stating that the sum of a number of random variables obeying certain conditions will assume a normal distribution as the number of variables becomes large.
  • certificate authority — (cryptography, body)   (CA or "Trusted Third Party") An entity (typically a company) that issues digital certificates to other entities (organisations or individuals) to allow them to prove their identity to others. A Certificate Authority might be an external company such as VeriSign that offers digital certificate services or they might be an internal organisation such as a corporate MIS department. The Certificate Authority's chief function is to verify the identity of entities and issue digital certificates attesting to that identity. The process uses public key cryptography to create a "network of trust". If I want to prove my identity to you, I ask a CA (who you trust to have verified my identity) to encrypt a hash of my signed key with their private key. Then you can use the CA's public key to decrypt the hash and compare it with a hash you calculate yourself. Hashes are used to decrease the amount of data that needs to be transmitted. The hash function must be cryptographically strong, e.g. MD5.
  • character development — the portrayal of people in a work of fiction in such a way that the reader or audience seems to learn more about them as they develop
  • character recognition — Character recognition is a process which allows computers to recognize written or printed characters such as numbers or letters and to change them into a form that the computer can use.
  • characteristic vector — a vector for which there exists a scalar such that the value of the vector under a given transformation is equal to the scalar times the vector.
  • charge-coupled device — an electronic device, used in imaging and signal processing, in which information is represented as packets of electric charge that are stored in an array of tiny closely spaced capacitors and can be moved from one capacitor to another in a controlled way
  • charity commissioners — (in Britain) members of a commission constituted to keep a register of charities and control charitable trusts
  • charterhouse of parma — a novel (1839) by Stendhal.
  • chequebook journalism — Chequebook journalism is the practice of paying people large sums of money for information about crimes or famous people in order to get material for newspaper articles.
  • chief warrant officer — a senior-ranking warrant officer in various armed forces
  • chinese water torture — a form of torture in which water is made to drip for a long period of time onto a victim's forehead to drive him insane
  • chink in one's armour — a small but fatal weakness
  • christmas decorations — decorations of different kinds appropriate to Christmas, such as tinsel, candles, images of angels, etc.
  • class-relation method — (programming)   A design technique based on the concepts of object-oriented programming and the Entity-Relationship model from the French company Softeam.
  • comfortably-furnished — containing comfortable furniture
  • comparative philology — comparative linguistics.
  • completing the square — a method, usually of solving quadratic equations, by which a quadratic expression, as x 2 − 4 x + 3, is written as the sum or difference of a perfect square and a constant, x 2 − 4 x + 4 + 3 − 4 = (x − 2) 2 − 1, by addition and subtraction of appropriate constant terms.
  • computer architecture — the structure, behaviour, and design of computers
  • conditional discharge — If someone who is convicted of an offence is given a conditional discharge by a court, they are not punished unless they later commit a further offence.
  • congregational church — any evangelical Protestant Christian Church that is governed according to the principles of Congregationalism. In 1972 the majority of churches in the Congregational Church in England and Wales voted to become part of the United Reformed Church
  • constant mesh gearbox — A constant mesh gearbox is a type of transmission in which all forward gear pairs remain engaged.
  • constantine the great — (Flavius Valerius Aurelius Constantinus"the Great") a.d. 288?–337, Roman emperor 324–337: named Constantinople as the new capital; legally sanctioned Christian worship.
  • consummatory behavior — a behavior pattern that occurs in response to a stimulus and that achieves the satisfaction of a specific drive, as the eating of captured prey by a hungry predator (distinguished from appetitive behavior).
  • corporate hospitality — Corporate hospitality is the entertainment that a company offers to its most valued clients, for example by inviting them to sporting events and providing them with food and drink.
  • cosmological redshift — the part of the redshift of celestial objects resulting from the expansion of the universe.
  • crude oil dehydration — Crude oil dehydration is the removal of water or water vapor from crude oil, by separating the oil from the water, often in a rotating centrifuge.
  • dance to another tune — to alter one's actions or opinions as a result of changed conditions
  • dataflow architecture — a means of arranging computer data processing in which operations are governed by the data present and the processing it requires rather than by a prewritten program that awaits data to be processed
  • dead from the neck up — stupid or unintelligent
  • decompression chamber — a chamber in which the pressure of air can be varied slowly for returning people from abnormal pressures to atmospheric pressure without inducing decompression sickness
  • defender of the faith — the title conferred upon Henry VIII by Pope Leo X in 1521 in recognition of the King's pamphlet attacking Luther's doctrines and retained by subsequent monarchs of England
  • dendrochronologically — By the use of, or with reference to dendrochronology.
  • do/did you hear (me)? — If you say 'Do you hear?' or 'Did you hear me?' to someone, you are telling them in an angry or forceful way to pay attention to what you are saying.
  • double spanish burton — a tackle having one standing block and two running blocks, giving a mechanical advantage of five, neglecting friction.
  • drop the handkerchief — a children's game in which all the players but one stand in a circle facing inward, while that one player stealthily drops a handkerchief behind a player in the circle who must pursue and attempt to catch the one who dropped the handkerchief before the latter reaches the vacated place.
  • earthmoving equipment — machines, such as bulldozers, that are used for excavating and moving large quantities of earth
  • easier said than done — difficult to do
  • electrochromatography — chromatography effected by the influence of an applied electric field
  • electroencephalograms — Plural form of electroencephalogram.
  • electroencephalograph — A machine used for electroencephalography.
  • electromyographically — By means of, or in terms of, electromyography.
  • electronystagmography — A diagnostic test to record involuntary movements of the eye caused by a condition known as nystagmus. It can also be used to diagnose the cause of vertigo, dizziness or balance dysfunction by testing the vestibular system.
  • enhanced oil recovery — any of several techniques that make it possible to recover more oil than can be obtained by natural pressure, such as the injection of fluid or gases into an oilfield to force more oil to the surface
  • enharmonic modulation — a change of key achieved by regarding a note in one key as an equivalent note in another. Thus E flat in the key of A flat could be regarded as D sharp in the key of B major
  • equiangular hyperbola — a hyperbola with transverse and conjugate axes equal to each other.
  • ethics of the fathers — a treatise of the Mishnah that comprises six chapters and consists chiefly of proverbs, aphorisms, and principles of ethics, law, and religion.
  • every dog has his day — one's luck will come
  • fermat's last theorem — the unproved theorem that the equation xn + yn = zn has no solution for x, y, z nonzero integers when n is greater than 2.
  • foreign exchange rate — the rate that specifies how much the currency of a nation is worth in terms of the currency of another nation
  • forensic anthropology — the branch of physical anthropology in which anthropological data, criteria, and techniques are used to determine the sex, age, genetic population, or parentage of skeletal or biological materials in questions of civil or criminal law.
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