21-letter words containing c, h, a, n
- dynamic data exchange — (language) (DDE, originally Dynamic Data Linking, DDL) A Microsoft Windows 3 hotlink protocol that allows application programs to communicate using a client-server model. Whenever the server (or "publisher") modifies part of a document which is being shared via DDE, one or more clients ("subscribers") are informed and include the modification in the copy of the data on which they are working.
- electroencephalograms — Plural form of electroencephalogram.
- electroencephalograph — A machine used for electroencephalography.
- 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
- epidemic encephalitis — any type of widespread encephalitis caused by various viruses
- extended architecture — (storage) (XA) A CD-ROM drive specification required by Green Book CD-ROM and White Book CD-ROM formats. Drives labelled "XA ready" may require a firmware upgrade.
- first consonant shift — the consonant shift described by Grimm's law, which distinguishes Germanic languages from other Indo-European languages.
- 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.
- forward exchange rate — the exchange rate of a currency to be delivered at a later date
- french and indian war — the war in America in which France and its Indian allies opposed England 1754–60: ended by Treaty of Paris in 1763.
- french fried potatoes — a more formal name for chips
- full faith and credit — the obligation under Article IV of the U.S. Constitution for each state to recognize the public acts, records, and judicial proceedings of every other state.
- fuming sulphuric acid — a mixture of pyrosulphuric acid, H2S2O7, and other condensed acids, made by dissolving sulphur trioxide in concentrated sulphuric acid
- gastrohepatic omentum — lesser omentum.
- get one's breath back — When you get your breath back after doing something energetic, you start breathing normally again.
- goldbach's conjecture — the conjecture that every even number greater than two is the sum of two prime numbers
- greenwich observatory — the national astronomical observatory of Great Britain, housed in a castle in E Sussex; formerly located at Greenwich.
- ground-effect machine — ACV (def 2).
- guaranteed scheduling — (algorithm) A scheduling algorithm used in multitasking operating systems that guarantees fairness by monitoring the amount of CPU time spent by each user and allocating resources accordingly.
- have a strong stomach — not to be prone to nausea
- have it coming to one — to deserve what one is about to suffer
- have one's cards read — If you have your cards read, you have your fortune told by someone who uses playing cards or tarot cards to tell you about yourself and predict your future.
- have the inside track — If you say that someone has the inside track, you mean that they have an advantage, for example special knowledge about something.
- hawaiian honeycreeper — any small to medium-sized finches of the subfamily Drepanidinae, native to the Hawaiian Islands and including many rare and extinct species.
- hay-pauncefote treaty — an agreement (1901) between the U.S. and Great Britain giving the U.S. the sole right to build a canal across Central America connecting the Atlantic and Pacific.
- hazard warning device — an appliance fitted to a motor vehicle that operates the hazard lights
- heliocentric parallax — the apparent displacement of an observed object due to a change in the position of the observer.
- henry steele commager — Henry Steele, 1902–98, U.S. historian, author, and teacher.
- hexachlorocyclohexane — (chemistry) A six-chlorine substituted cyclohexane, a polyhalogenated compound used in pesticides.
- highest common factor — greatest common divisor. Abbreviation: H.C.F.
- hindu-arabic numerals — Arabic numeral.
- homogeneous catalysis — Homogeneous catalysis is catalysis in which the catalyst takes part in the reaction that it increases.
- horns and halo effect — a tendency to allow one's judgement of another person, esp in a job interview, to be unduly influenced by an unfavourable (horns) or favourable (halo) first impression based on appearances
- host command facility — (operating system) (HCF) Used to access IBM S/36 and AS/400 computers from a mainframe.
- hubble classification — a method of classifying galaxies depending on whether they are elliptical, spiral, barred spiral, or irregular
- human rights activist — a person who campaigns for human rights
- humanistic psychology — an approach to psychology that emphasizes emotions and the better understanding of the self in terms of observation of oneself and one's relations with others
- ilya ilyich mechnikov — Élie [French ey-lee] /French eɪˈli/ (Show IPA), (Ilya Ilyich Mechnikov) 1845–1916, Russian zoologist and bacteriologist in France: Nobel Prize in medicine 1908.
- immunohistochemically — By means of or in regard to immunohistochemistry.
- in co-ordination with — If you do something in co-ordination with someone else, you both organize your activities so that you work together efficiently.
- in the first instance — You say in the first instance to mention something that is the first step in a series of actions.
- indicated horse-power — the horsepower of a reciprocating engine as shown by an indicator record. Abbreviation: ihp, IHP.
- industrial psychology — the application of psychological principles and techniques to business and industrial problems, as in the selection of personnel or development of training programs.
- insulin shock therapy — a former treatment for mental illness, especially schizophrenia, employing insulin-induced hypoglycemia as a method for producing convulsive seizures.
- irish republican army — an underground Irish nationalist organization founded to work for Irish independence from Great Britain: declared illegal by the Irish government in 1936, but continues activity aimed at the unification of the Republic of Ireland and Northern Ireland. Abbreviation: IRA, I.R.A.
- johann sebastian bach — Johann Sebastian [yoh-hahn si-bas-chuh n;; German yoh-hahn zey-bahs-tee-ahn] /ˈyoʊ hɑn sɪˈbæs tʃən;; German ˈyoʊ hɑn zeɪˈbɑs tiˌɑn/ (Show IPA), 1685–1750, German organist and composer.
- joint chiefs of staff — the chiefs of staff of the army and the air force, the commandant of the marine corps, and the chief of naval operations, together with a chairman selected from one of the branches of the armed forces, serving as the principal military advisory body to the president, the National Security Council, and the secretary of defense.