18-letter words containing a, c, e, s, h, r
- acorn risc machine — (processor) The original name of the Advanced RISC Machine.
- addressing machine — a printer that prints addresses directly on to letters, labels, and envelopes
- 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
- albrecht waldstein — Albrecht von [German ahl-brekht fuh n] /German ˈɑl brɛxt fən/ (Show IPA), Wallenstein, Albrecht Wenzel Eusebius von.
- alternative school — any public or private school having a special curriculum, especially an elementary or secondary school offering a more flexible program of study than a traditional school.
- anticholinesterase — any of a group of substances that inhibit the action of cholinesterase
- apocryphal gospels — accounts of Christ's life that are not recognized as part of the New Testament
- arm's-length price — a price of a transaction agreed in accordance with market values, disregarding any connection such as common ownership of the companies involved
- aspherical surface — a lens or mirror surface that does not form part of a sphere and is used to reduce aberrations
- ast research, inc. — (company) A company, formed some time before 1980, that was a leading personal computer manufacturer. AST developed desktop computers, mobile computers, and servers that were sold in more than 100 countries worldwide. In January 1999 the name and intellectual property were acquired by a new company named AST Computers, LLC. As of 2000-03-02 it was trading as ARI Service.
- athletic supporter — jockstrap
- 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
- auditory phonetics — the branch of phonetics concerned with the perception of speech sounds by humans
- australopithecines — Plural form of australopithecine.
- bachelor's-buttons — any of various plants of the daisy family with button-like flower heads
- basket-handle arch — an arch having a symmetrical form drawn from an odd number of radii in excess of one, which increase in length from the springing toward the center.
- behavioral science — any of several studies, as sociology, psychology, anthropology, etc., that examine human activities in an attempt to discover recurrent patterns and to formulate rules about social behavior
- 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.
- breach of security — an act that violates a country, area, or building's security measures
- breast enhancement — a surgical procedure to increase the size of a woman's breasts
- breathing exercise — an exercise intended to promote effective and healthy breathing and breath control
- broadcasting house — any of a number of buildings in the UK from which the BBC broadcasts or has broadcast
- call to the colors — call or order to serve in the armed forces
- camel's-hair brush — an artist's small brush, made of hair from a squirrel's tail
- camembert (cheese) — a soft, rich, creamy partly ripened cheese
- carbonic anhydrase — an enzyme in blood cells that catalyses the decomposition of carbonic acid into carbon dioxide and water, facilitating the transport of carbon dioxide from the tissues to the lungs
- cash-for-questions — of, involved in, or relating to a scandal in which some MPs were accused of accepting bribes to ask particular questions in Parliament
- cassiopeia's chair — the five brightest stars in the constellation Cassiopeia that seem to form the shape of a W or M
- catastrophe theory — a mathematical theory that classifies surfaces according to their form
- catch one's breath — When you catch your breath while you are doing something energetic, you stop for a short time so that you can start breathing normally again.
- catherine of siena — Saint. 1347–80, Italian mystic and ascetic; patron saint of the Dominican order. Feast day: April 29
- cathode dark space — Crookes dark space.
- cauliflower cheese — a dish of cauliflower with a cheese sauce, eaten hot
- centralized school — a public school formed from the pupils and teachers of a number of discontinued smaller schools, especially in a rural district.
- chagos archipelago — group of islands in the Indian Ocean 1,180 mi (1,899 km) northeast of Mauritius, comprising the British Indian Ocean Territory: chief island, Diego Garcia
- 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
- chambered nautilus — nautilus (def 1).
- character disorder — a disorder characterized by socially undesirable behavior, as poor control of impulses or inability to maintain close emotional relationships, and by absence of anxiety or guilt.
- character graphics — ASCII art
- characteristically — Also, characteristical. pertaining to, constituting, or indicating the character or peculiar quality of a person or thing; typical; distinctive: Red and gold are the characteristic colors of autumn.
- charge of quarters — a member of the armed forces who handles administration in his or her unit, esp after duty hours
- chartered surveyor — (in Britain) a surveyor who is registered with the Royal Institution of Chartered Surveyors as having the qualifications, training, and experience to satisfy their professional requirements
- chattering classes — The chattering classes are people such as journalists, broadcasters, or public figures who comment on events but have little or no influence over them.
- chew someone's ear — to reprimand severely
- chickenheartedness — Alternative form of chicken-heartedness.
- children of israel — the Jews; Hebrews
- children's crusade — a crusade to recover Jerusalem from the Saracens, undertaken in 1212 by thousands of French and German children who perished, were sold into slavery, or were turned back.
- chinese water deer — a small Chinese or Korean deer, Hydropotes inermis, having tusks and no antlers: introduced into England and France
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