18-letter words containing c, h, o, m, s
- acorn risc machine — (processor) The original name of the Advanced RISC Machine.
- aerothermodynamics — the study of the exchange of heat between solids and gases, esp of the heating effect on aircraft flying through the air at very high speeds
- anti-scholasticism — narrow adherence to traditional teachings, doctrines, or methods.
- atmospheric engine — an early form of single-acting engine in which the power stroke is provided by atmospheric pressure acting upon a piston in an exhausted cylinder.
- atmospheric window — wavelengths of the electromagnetic spectrum that can be transmitted through the earth's atmosphere. Atmospheric windows occur in the visible, infrared, and radio regions of the spectrum
- benchmark position — a public service job used for comparison with a similar position, such as a position in commerce, for wage settlements
- bichromate process — any of several methods of photography in which the light-sensitive medium is alkaline bichromate associated with a colloid such as gum, albumen, or gelatin.
- chamber of horrors — a room, for example in a waxworks, containing objects, images or representations of people or scenes that are believed likely to frighten or horrify visitors
- championship point — a point that would decide the winner of a match that would decide the championship
- chew someone's ear — to reprimand severely
- chinese watermelon — a tropical Asian vine, Benincasa hispida, of the gourd family, having a brown, hairy stem, large, solitary, yellow flowers, and white, melonlike fruit.
- christian democrat — a member or supporter of a Christian Democratic party
- christian reformed — of or relating to a Protestant denomination (Christian Reformed Church) organized in the U.S. in 1857 by groups that had seceded from the Dutch Reformed Church.
- christmas shopping — shopping especially for Christmas presents, but also for Christmas food and drink, and all the other things required over the Christmas period.
- christmas stocking — A Christmas stocking is a long sock which children hang up on Christmas Eve. During the night, parents fill the stocking with small presents.
- chromatic semitone — the pitch difference between one note and its sharpened or flattened equivalent
- chronic alcoholism — long-term alcohol addiction
- circular dichroism — selective absorption of one of the two possible circular polarizations of light.
- combustion chamber — an enclosed space in which combustion takes place, such as the space above the piston in the cylinder head of an internal-combustion engine or the chambers in a gas turbine or rocket engine in which fuel and oxidant burn
- come home to roost — If bad or wrong things that someone has done in the past have come home to roost, or if their chickens have come home to roost, they are now experiencing the unpleasant effects of these actions.
- come to grips with — If you come to grips with a problem, you consider it seriously, and start taking action to deal with it.
- come to terms with — If you come to terms with something difficult or unpleasant, you learn to accept and deal with it.
- common-law husband — a man considered to be a woman's husband after the couple have cohabited for several years
- commonwealth games — an event held every four years in which sportspeople from the countries of the Commonwealth compete
- community hospital — (in the US) a local hospital
- comparison shopper — an employee of a retail store hired to visit competing stores in order to gather information regarding styles, quality, prices, etc., of merchandise offered by competitors.
- comprehensibleness — The quality of being comprehensible; comprehensibility.
- considered harmful — (programming, humour) A type of phrase based on the title of Edsger W. Dijkstra's famous note in the March 1968 Communications of the ACM, "Goto Statement Considered Harmful", which fired the first salvo in the structured programming wars. Amusingly, the ACM considered the resulting acrimony sufficiently harmful that it will (by policy) no longer print articles taking so assertive a position against a coding practice. In the ensuing decades, a large number of both serious papers and parodies bore titles of the form "X considered Y". The structured-programming wars eventually blew over with the realisation that both sides were wrong, but use of such titles has remained as a persistent minor in-joke.
- cot death syndrome — the unexplained sudden death of an infant during sleep
- crystal microphone — a microphone that uses a piezoelectric crystal to convert sound energy into electrical energy
- cushing's syndrome — a medical condition characterized by obesity, hypertension, excessive hair growth, etc., caused by an overactive adrenal gland or large doses of corticosteroids
- diatomaceous earth — an unconsolidated form of diatomite
- diplomatic shuttle — a series of diplomatic visits to other states made by an official, such as an ambassador or envoy
- dispatch documents — documents sent with a parcel, etc, detailing information such as contents, delivery address, etc
- dynamic psychology — any system of psychology that emphasizes the interaction between different motives, emotions, and drives
- dysthymic disorder — a psychiatric disorder characterized by generalized depression that lasts for at least a year
- ethnomusicological — Relating to or pertaining to ethnomusicology.
- euclid's algorithm — (algorithm) (Or "Euclidean Algorithm") An algorithm for finding the greatest common divisor (GCD) of two numbers. It relies on the identity gcd(a, b) = gcd(a-b, b) To find the GCD of two numbers by this algorithm, repeatedly replace the larger by subtracting the smaller from it until the two numbers are equal. E.g. 132, 168 -> 132, 36 -> 96, 36 -> 60, 36 -> 24, 36 -> 24, 12 -> 12, 12 so the GCD of 132 and 168 is 12. This algorithm requires only subtraction and comparison operations but can take a number of steps proportional to the difference between the initial numbers (e.g. gcd(1, 1001) will take 1000 steps).
- forensic chemistry — the application of facts concerning chemistry to questions of civil and criminal law.
- gas chromatography — a chromatograph used for the separation of volatile substances.
- genetic algorithms — genetic algorithm
- heat of combustion — the heat evolved when one mole of a substance is burnt in oxygen at constant volume
- hemicorporectomies — Plural form of hemicorporectomy.
- hemorrhoidectomies — Plural form of hemorrhoidectomy.
- histocompatibility — the condition of having antigenic similarities such that cells or tissues transplanted from one (the donor) to another (the recipient) are not rejected.
- histomorphological — histology.
- homeowner's policy — a form of home insurance that provides compensation for damage, loss, or injury of property, personal belongings, or persons due to fire, theft, accidents, etc.
- honeysuckle family — the plant family Caprifoliaceae, typified by shrubs and woody vines having opposite leaves, clusters of usually flaring, narrow, tubular flowers, and various types of fruit, and including the elder, honeysuckle, snowberry, twinflower, and viburnum.
- hypercholesteremia — Alternative spelling of hypercholesteraemia.
- hypermodern school — a style of chess characterized by control of the centre from the flanks
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