12-letter words containing a, c, m, e
- archesporium — archespore.
- archiphoneme — an abstract linguistic unit representing two or more phonemes when the distinction between these has been neutralized: conventionally shown by a capital letter within slashes, as /T/ for /t/ and /d/ in German Rat and Rad
- arithmetical — Arithmetical calculations, processes, or skills involve the addition, subtraction, multiplication, or division of numbers.
- armada chest — an iron or iron-bound strongbox of the 17th or 18th century.
- armed forces — The armed forces or the armed services of a country are its military forces, usually the army, navy, marines, and air force.
- arming chest — a chest for holding armor and weapons.
- armoured car — a fast lightly armed and armoured vehicle, mainly used for reconnaissance
- army officer — a person in the army who holds a position of authority, responsibility and duty, especially one who holds a commission
- ascomycetous — belonging or pertaining to the Ascomycota.
- astigmoscope — astigmatoscope.
- astrochemist — (chemistry, astronomy) A chemist or astronomer whose speciality is astrochemistry.
- asymmetrical — Something that is asymmetrical has two sides or halves that are different in shape, size, or style.
- atmospherics — Atmospherics are elements in something such as a piece of music or a book which create a certain atmosphere.
- atomic power — nuclear power.
- autocomplete — a feature of a word processor, email program, web browser, etc., that automatically predicts the remaining characters in a word or phrase based on what has been typed or input before: If you supply the information, your browser will be able to use autocomplete to fill out online forms.
- axiom schema — (logic) A formula in the language of an axiomatic system, containing one or more. These metasyntactic variables (or "schematic variables") that stand for terms or subformulae. An example is the Axiom of Comprehension.
- axisymmetric — being symmetrical around an axis
- bach trumpet — a modern small three-valved trumpet for playing clarino passages in Bach's music
- backswimmers — Plural form of backswimmer.
- backwoodsmen — Plural form of backwoodsman.
- balance beam — a long, narrow, horizontal wooden beam raised about 4 feet (1.2 m) above the floor, on which women gymnasts perform balancing routines consisting of jumps, tumbles, turns, running steps, etc.
- balsamaceous — any of various fragrant exudations from certain trees, especially trees of the genus Commiphora, as balm-of-Gilead. Compare balm (def 1).
- barometrical — (archaic) Relating to, or observed with, a barometer, barometric.
- basmati rice — a variety of long-grain rice with slender aromatic grains, used for savoury dishes
- beach-comber — a person who lives by gathering salable articles of jetsam, refuse, etc., from beaches.
- beach-la-mar — an English-based creole language spoken in Vanuatu and Fiji, and formerly much more widespread
- beachcombers — Plural form of beachcomber.
- beachcombing — The action of a beachcomber.
- beam balance — a piece of apparatus used for artistic gymnastics
- beam compass — an instrument for drawing large circles or arcs, consisting of a horizontal beam along which two vertical legs slide
- bearded clam — mollusc eaten as seafood
- beaumarchais — Pierre Augustin Caron de (pjɛr oɡystɛ̃ karɔ̃ də). 1732–99, French dramatist, noted for his comedies The Barber of Seville (1775) and The Marriage of Figaro (1784)
- beauty cream — a cosmetic cream
- beech marten — stone marten.
- bench-warmer — a substitute who rarely gets to play in a game.
- benchmarking — In business, benchmarking is a process in which a company compares its products and methods with those of the most successful companies in its field, in order to try to improve its own performance.
- bicameralism — having two branches, chambers, or houses, as a legislative body.
- bidialectism — proficient in or using two dialects of the same language.
- biomagnetics — the study of magnetic fields as a form of therapy
- biomechanics — the study of the mechanics of the movement of living organisms
- biometrician — a person who is knowledgeable about biometry
- biomolecular — relating to a biomolecule
- bismarck sea — an arm of the Pacific Ocean north of New Britain and north-east of New Guinea
- black comedy — a comedy dealing with an unpleasant situation in a pessimistic or macabre manner
- black market — If something is bought or sold on the black market, it is bought or sold illegally.
- black medick — a small European leguminous plant, Medicago lupulina, with trifoliate leaves, small yellow flowers, and black pods
- black stream — a warm ocean current in the Pacific, flowing N along the E coast of Taiwan, NE along the E coast of Japan, and continuing in an easterly direction into the open Pacific.
- black-market — to black-marketeer.
- blastomycete — any of a genus (Blastomyces) of yeastlike imperfect fungi that cause diseases in people and animals
- bombacaceous — of, relating to, or belonging to the Bombacaceae, a family of tropical trees, including the kapok tree and baobab, that have very thick stems, often with water-storing tissue