22-letter words containing a, c, h, r
- dalton's atomic theory — the theory that matter consists of indivisible particles called atoms and that atoms of a given element are all identical and can neither be created nor destroyed. Compounds are formed by combination of atoms in simple ratios to give compound atoms (molecules). The theory was the basis of modern chemistry
- delayed-action shutter — a camera shutter that opens after an interval set by the photographer
- diachronic linguistics — historical linguistics.
- diethylbarbituric acid — barbital
- directed acyclic graph — (DAG) A directed graph containing no cycles. This means that if there is a route from node A to node B then there is no way back.
- directional microphone — a microphone that has a greater sensitivity to sounds coming from a particular area in front of it: used to eliminate unwanted sounds.
- dishonorable discharge — the discharge of a person from military service for an offense more serious than one for which a bad-conduct discharge is given.
- dominant seventh chord — a chord consisting of the dominant and the major third, perfect fifth, and minor seventh above it. Its most natural resolution is to a chord on the tonic
- drumhead court-martial — a court-martial held, usually on a battlefield, for the summary trial of charges of offenses committed during military operations.
- earth inductor compass — a compass actuated by induction from the earth's magnetic field.
- echegaray y eizaguirre — José (xoˈse). 1832–1916, Spanish dramatist, statesman, and mathematician. His plays include Madman or Saint (1877); Nobel prize for literature 1904
- ectotrophic mycorrhiza — a type of mycorrhiza, typical of temperate and Boreal trees, in which the fungus forms a layer on the outside of the roots of the plant
- electroencephalographs — Plural form of electroencephalograph.
- electroencephalography — The measurement of electrical activity in different parts of the brain and the recording of such activity as a visual trace (on paper or on an oscilloscope screen).
- electrophysiologically — In an electrophysiological way.
- electrothermal printer — a printer that produces characters by burning the image on specially coated paper
- enchanter's nightshade — any of several onagraceous plants of the genus Circaea, esp C. lutetiana, having small white flowers and bristly fruits
- endotrophic mycorrhiza — the most widespread and common type of mycorrhiza, in which the fungus lives within the cells of the roots of the plant
- english cocker spaniel — any of a breed of small spaniel, similar to and the progenitor of the cocker spaniel
- enhanced parallel port — (hardware) (EPP) A parallel port that confirms to the IEEE's EPP standard. An EPP is actually an expansion bus that can handle 64 disk drives and other peripherals.
- every now and then etc — You use every in the expressions every now and then, every now and again, every once in a while, and every so often in order to indicate that something happens occasionally.
- fetal alcohol syndrome — a pattern of birth defects caused by maternal consumption of alcohol during pregnancy: considered as one of the fetal alcohol spectrum disorders. Abbreviation: FAS.
- first cab off the rank — the first person, etc, to do or take advantage of something
- floating exchange rate — a system in which the value of a currency fluctuates against other currencies in accordance with market forces
- forth modification lab — (event) (FORML) A Forth conference held every November on the West coast of the USA ().
- four-hundred-day clock — a clock that needs to be wound once a year, having the works exposed under a glass dome and utilizing a torsion pendulum.
- garmisch-partenkirchen — a city in S Germany, in the Bavarian Alps.
- geographic determinism — a doctrine that regards geographical conditions as the determining or molding agency of group life.
- get one's act together — anything done, being done, or to be done; deed; performance: a heroic act.
- go through one's paces — to show one's abilities, skills, etc.
- gold-exchange standard — a monetary system in one country in which currency is maintained at a par with that of another country that is on the gold standard.
- grand duchy of muscovy — Muscovy (def 1).
- graphical display unit — an output device incorporating a cathode ray tube on which both line drawings and text can be displayed. It is usually used in conjunction with a light pen to input or reposition data
- gum bichromate process — a contact printing method in which the image is formed on a coating of sensitized gum containing a suitable colored pigment and potassium or ammonium dichromate.
- hague peace conference — a meeting held at The Hague, Netherlands, in 1899, that established The Hague Permanent Court of Arbitration.
- halfwave rectification — a rectifier that changes only one half of a cycle of alternating current into a pulsating, direct current.
- hans christian oersted — Hans Christian [hahns kris-tyahn] /hɑns ˈkrɪs tyɑn/ (Show IPA), 1777–1851, Danish physicist.
- harvard classification — a classification of stars based on the characteristic spectral absorption lines and bands of the chemical elements present
- hemorrhagic septicemia — an acute infectious disease of animals, caused by the bacterium Pasteurella multocida, and characterized by fever, catarrhal symptoms, pneumonia, and general blood infection.
- hereford and worcester — a county in W England. 1516 sq. mi. (3926 sq. km).
- hexahydroxycyclohexane — inositol.
- highway contract route — a route for carrying mail over the highway between designated points, given on contract to a private carrier and often requiring, in rural areas, delivery to home mailboxes. Abbreviation: HCR.
- historical linguistics — the study of changes in a language or group of languages over a period of time.
- historical materialism — (in Marxist theory) the doctrine that all forms of social thought, as art or philosophy, and institutions, as the family or the state, develop as a superstructure founded on an economic base; that they reflect the character of economic relations and are altered or modified as a result of class struggles; that each ruling economic class produces the class that will destroy or replace it; and that dialectical necessity requires the eventual withering away of the state and the establishment of a classless society: the body of theory, in dialectical materialism, dealing with historical process and social causation.
- horizontal application — An application program common to different business processes, e.g. office automation. Compare vertical application.
- horn-rimmed spectacles — spectacles with rims made of material resembling horn
- horse of another color — an entirely different matter
- host control interface — (hardware, wireless) (HCI) A network layer in the Bluetooth Core Protocol Stack, lying between the software and the hardware stacks and serving as the interface through which the software controls two of Bluetooth's four core protocols.
- human interface device — (hardware) (HID) Any device to interact directly with humans (mostly input) like keyboard, mouse, joystick, or graphics tablet.
- hydrocinnamic aldehyde — a colorless liquid, C 9 H 10 O, having a floral odor, used in perfumery and flavoring.