15-letter words containing a, n, t, i, r, m
- aristotelianism — a philosophical tradition based on the wide-ranging belief system of Aristotle
- arithmetic mean — an average value of a set of integers, terms, or quantities, expressed as their sum divided by their number
- arms inspection — the official checking of a country's weapons and other military equipment, usually to check that international agreements have been respected
- arrondissements — Plural form of arrondissement.
- astrodynamicist — a person who studies astrodynamics
- australian mist — a breed of medium-sized cat with a short spotted or marbled coat
- badminton court — the court on which games of badminton are played
- bangtail muster — a roundup of cattle to be counted, each one having the hairs on its tail docked as it is counted
- bar examination — a written examination to determine if one is qualified to practice law in a particular jurisdiction.
- barium titanate — a crystalline ceramic used in capacitors and piezoelectric devices. Formula: BaTiO3
- barry mountains — a mountain range in SE Australia, in E Victoria: part of the Australian Alps
- battery farming — the activity of using batteries for raising poultry
- bedtime reading — a book, magazine etc read at bedtime
- bohemian forest — a mountain range between the SW Czech Republic and SE Germany. Highest peak: Arber, 1457 m (4780 ft)
- boston marriage — (especially in 19th-century New England) an intimate friendship between two women often maintaining a household together.
- britannia metal — an alloy of low melting point consisting of tin with 5–10 per cent antimony, 1–3 per cent copper, and sometimes small quantities of zinc, lead, or bismuth: used for decorative purposes and for bearings
- brother-in-arms — a fellow soldier or comrade in a shared struggle
- brown-tail moth — a white moth, Nygmia phaerrhoea, having a brown tuft at the end of the abdomen, the larvae of which feed on the foliage of various shade and fruit trees.
- brownian motion — the irregular motion of small particles suspended in a liquid or a gas, caused by the bombardment of the particles by molecules of the medium: first observed by Robert Brown in 1827.
- cactus geranium — a plant, Pelargonium echinatum, of the geranium family, native to southern Africa, having prickly stipules and white or reddish flowers.
- cadmean victory — a victory won with great losses to the victors
- cairngorm-stone — smoky quartz.
- calcium nitrate — a white, deliquescent solid, Ca(NO 3) 2 , used chiefly in the manufacture of fertilizers, fireworks, matches, and explosives.
- cantilever beam — a long thick straight-sided piece of wood, metal, concrete, etc that is fixed at one end and is free at the other
- car maintenance — the act of maintaining an automobile
- cardinal system — a system of coding navigational aids by shape, color, and number, according to their positions relative to navigational hazards.
- carmarthenshire — a county of S Wales, formerly part of Dyfed (1974–96): on Carmarthen Bay, with the Cambrian Mountains in the N: generally agricultural (esp dairying). Administrative centre: Carmarthen. Pop: 176 000 (2003 est). Area: 2398 sq km (926 sq miles)
- castanospermine — a substance obtained from the Australian chestnut or black bean tree
- castrametations — Plural form of castrametation.
- central america — an isthmus joining the continents of North and South America, extending from the S border of Mexico to the NW border of Colombia and consisting of Belize, Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica, and Panama. Area: about 518 000 sq km (200 000 sq miles)
- chemosterilants — Plural form of chemosterilant.
- chinese mustard — brown mustard.
- church militant — those Christians on earth who are engaged in a continuous war against evil and the enemies of Christ.
- cinematographed — a motion-picture projector.
- cinematographer — A cinematographer is a person who decides what filming techniques should be used during the shooting of a film.
- cinematographic — a motion-picture projector.
- circumambiently — in a circumambient manner
- circumferential — of, at, or near the circumference; surrounding; lying along the outskirts.
- circumnavigated — Simple past tense and past participle of circumnavigate.
- circumnavigates — Third-person singular simple present indicative form of circumnavigate.
- circumnavigator — A person who circumnavigates; that is, sails around the world.
- circumstantials — incidentals; details
- circumstantiate — to support by giving particulars
- circumvallating — Present participle of circumvallate.
- circumvallation — surrounded by or as if by a rampart.
- climate control — air conditioning in a building or vehicle
- climb indicator — an instrument that shows the rate of ascent or descent of an aircraft, operating on a differential pressure principle.
- codetermination — joint participation of management and employees or employees' trade union representatives in some decisions
- combat neurosis — battle fatigue.
- combinatorially — in a combinatorial manner