18-letter words containing o, n, m, a, s
- a month of sundays — a long unspecified period
- able-bodied seaman — an ordinary seaman, esp one in the merchant navy, who has been trained in certain skills
- abominable snowman — a large legendary manlike or apelike creature, alleged to inhabit the Himalayan Mountains
- absolute magnitude — the apparent magnitude a given star would have if it were situated at a distance of 10 parsecs (32.6 light years) from the earth
- acorn risc machine — (processor) The original name of the Advanced RISC Machine.
- acoustic impedance — the total reaction of a medium to the transmission of sound through it, expressed as the ratio of sound pressure to particle velocity at a given point in the medium.
- adenocarcinomatous — Of or pertaining to adenocarcinomas.
- adenosylmethionine — (biochemistry) An adenosyl derivative of methionine that is a common co-substrate involved in transmethylation.
- aerospace medicine — aviation medicine
- 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
- age discrimination — discrimination against older people, especially by employers
- ailanthus silkworm — a green silkworm, Samia walkeri, introduced into the U.S. from China, that feeds on the leaves of the ailanthus.
- alexius i comnenus — 1048–1118, ruler of the Byzantine Empire (1081–1118)
- almoner's cupboard — a cupboard with pierced doors, formerly used as a storage place for food.
- aminosuccinic acid — aspartic acid.
- ammonium phosphate — monoammonium phosphate.
- anthropomorphising — Present participle of anthropomorphise.
- anthropomorphously — In an anthropomorphous manner; in a manner resembling that of a human.
- anti-commercialism — the principles, practices, and spirit of commerce.
- anti-masonic party — a former political party (1826–35) that opposed Freemasonry in civil affairs.
- anti-miscegenation — marriage or cohabitation between two people from different racial groups, especially, in the U.S., between a black person and a white person: In 1968 the Supreme Court ruled unanimously that state laws prohibiting miscegenation were unconstitutional.
- anti-scholasticism — narrow adherence to traditional teachings, doctrines, or methods.
- antidiscrimination — (legal) Opposing or disallowing discrimination.
- antiferromagnetism — the phenomenon exhibited by substances that resemble paramagnetic substances in the value of their relative permeability but that behave like ferromagnetic substances when their temperature is varied
- arrest of judgment — a stay of proceedings after a verdict, on the grounds of error or possible error
- assessment process — a series of steps that constitute a method of assessing students or workers
- assignment problem — (mathematics, algorithm) (Or "linear assignment") Any problem involving minimising the sum of C(a, b) over a set P of pairs (a, b) where a is an element of some set A and b is an element of set B, and C is some function, under constraints such as "each element of A must appear exactly once in P" or similarly for B, or both. For example, the a's could be workers and the b's projects. The problem is "linear" because the "cost function" C() depends only on the particular pairing (a, b) and is independent of all other pairings.
- associated company — a company which is largely controlled by its parent company because the latter owns anything up to 50% of the shares
- assortative mating — the reproductive pairing of individuals that have more traits in common than would likely be the case if mating were random (contrasted with disassortative mating).
- assumption of risk — Assumption of risk is the practice of paying for minor losses yourself, but protecting against catastrophic losses by buying insurance cover.
- astrometric binary — a binary star that can be recognized as such because of its undulating proper motion.
- astronomical clock — a complex clock showing astronomical phenomena, such as the phases of the moon
- at someone's elbow — very close to someone; easy to reach
- at/from a distance — If you are at a distance from something, or if you see it or remember it from a distance, you are a long way away from it in space or time.
- 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
- autoimmune disease — a disease resulting from a disordered immune reaction in which antibodies are produced against one's own tissues, as systemic lupus erythematosus or rheumatoid arthritis.
- autonomous phoneme — a phoneme that is defined or determined by its contrast in sound with other phonemes, without reference to its role in morphology or any other level of linguistic analysis beyond the phonetic level.
- awnless bromegrass — Hungarian bromegrass.
- backus normal form — Backus-Naur Form
- basal conglomerate — a conglomerate deposited on an erosion surface and constituting the bottom layer of a stratigraphic series.
- benchmark position — a public service job used for comparison with a similar position, such as a position in commerce, for wage settlements
- bend someone's ear — to speak at length to an unwilling listener, esp to voice one's troubles
- bioinstrumentation — the use of instruments, as sensors, to detect and measure certain body functions, as of persons in spaceflight, and transmit the data to a point where it is evaluated
- board of examiners — a group of people who officially administer examinations
- boltzmann constant — the ratio of the gas constant to the Avogadro constant, equal to 1.380 650 × 10–23 joule per kelvin
- bomb disposal unit — a unit of the police or armed services specializing in bomb disposal
- bounty-fed farmers — farmers who benefit from subsidies
- british somaliland — a former British protectorate (1884–1960) in E Africa, on the Gulf of Aden: united with Italian Somaliland in 1960 to form Somalia (or the Somali Republic); in 1991 the self-styled republic of Somaliland, covering the same area as the former British Somaliland, declared itself independent and continues to function largely as a separate entity, though without international recognition
- cambrian mountains — a mountain range in Wales, extending from Carmarthenshire in the S to Denbighshire in the N. Highest peak: Aran Fawddwy, 891 m (2970 ft)
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