12-letter words containing a, p, r, o, c
- arachnophobe — a person who is afraid of spiders
- arch support — a rigid support placed inside a shoe so that its molded form fits the arch of the foot and relieves strain on the muscles of the foot while walking, standing, etc.
- archeopteryx — A specimen of the species Archaeopteryx lithographica, being the earliest and most primitive known bird, representing a transition in the evolution of dinosaurs to birds.
- archesporial — the primitive cell, or group of cells, that give rise to the cells from which spores are derived.
- archesporium — archespore.
- archipelagos — Plural form of archipelago.
- 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
- arctophilist — a collector of teddy bears
- aria da capo — an operatic aria in three sections with the first and third sections alike and the middle section contrasting.
- aristophanic — 448?–385? b.c, Athenian comic dramatist.
- arthropathic — disease of the joints.
- arthroscopes — Plural form of arthroscope.
- arthroscopic — the use of an arthroscope to diagnose an injury to or disease of a joint or to perform minor surgery on a joint.
- aspect ratio — the ratio of width to height of the picture on a television or cinema screen
- asphalt rock — a rock formation, usually of limestone or sandstone, containing large amounts of bitumens.
- astrocompass — a navigational instrument for giving directional bearings from the centre of the earth to a particular star. It is carried in long-range aircraft, ships, spacecraft, etc
- astrophysics — Astrophysics is the study of the physical and chemical structure of the stars, planets, and other natural objects in space.
- atmospherics — Atmospherics are elements in something such as a piece of music or a book which create a certain atmosphere.
- atomic power — nuclear power.
- bachelor pad — a flat in which a bachelor lives
- bachelorship — the state of being a bachelor; bachelorhood
- barge couple — either of a pair of outside rafters along the gable end of a roof
- baroreceptor — a collection of sensory nerve endings, principally in the carotid sinuses and the aortic arch, that monitor blood pressure changes in the body
- basidiocarps — Plural form of basidiocarp.
- biographical — Biographical facts, notes, or details are concerned with the events in someone's life.
- black copper — a regulus of 95-percent-pure copper, produced in a blast furnace by smelting oxidized copper ores.
- black poplar — a Eurasian tree, Populus nigra
- black powder — gunpowder as used in sports involving modern muzzleloading firearms
- bobbery pack — a mixed pack of hunting dogs, often not belonging to any of the hound breeds
- boot-scraper — a contraption consisting of an upright metal shape formerly placed outside some houses to enable people to scrape the mud from their boots before going in
- branch depot — one of a several depots receiving stock from the same central supplier
- branch point — Electricity. a point in an electric network at which three or more conductors meet.
- bronchospasm — an abnormal contraction of the bronchi resulting in restriction of the airway
- caloreceptor — a receptor stimulated by heat.
- camelopardus — a faint extensive constellation in the N hemisphere close to Ursa Major and Cassiopeia
- camera phone — A camera phone is a mobile phone that can also take photographs.
- camerapeople — a person who operates a camera, especially a movie or TV camera.
- cameraperson — a camera operator
- camphor ball — mothball
- camphor tree — a lauraceous evergreen E Asian tree, Cinnamomum camphora, whose aromatic wood yields camphor
- camphorating — Present participle of camphorate.
- campo formio — a village in NE Italy, in Friuli-Venezia Giulia: scene of the signing of a treaty in 1797 that ended the war between revolutionary France and Austria
- campo grande — a city in SW Brazil, capital of Mato Grosso do Sul state on the São Paulo–Corumbá railway: market centre. Pop: 746 000 (2005 est)
- campodeiform — resembling insects of the genus Campodea
- cancerphobia — an excessive fear of getting cancer
- canine corps — a military or law enforcement body which uses dogs for the detection of explosives or drugs or for security, tracking, etc
- canton crepe — a fine crinkled silk or rayon crepe fabric, slightly heavier than crepe de Chine
- caparisoning — Present participle of caparison.
- cape colored — a South African of mixed European and African or Malayan ancestry.
- cape comorin — a headland at the southernmost point of India, in Tamil Nadu state