12-letter words containing r, h
- arming chest — a chest for holding armor and weapons.
- aromatherapy — Aromatherapy is a type of treatment which involves massaging the body with special fragrant oils.
- array theory — (theory) A theory developed by Trenchard More Jr. and used as the basis for the NIAL language. Papers are available from the IBM Cambridge Scientific Center, Cambridge MA.
- arsphenamine — a drug containing arsenic, formerly used in the treatment of syphilis and related infections
- arteriopathy — Any disease of the arteries.
- arthrobacter — a genus of rod-shaped or spherical bacteria found in the soil.
- arthrography — the X-ray examination of a joint after injection of a contrast medium into the joint space
- arthropathic — disease of the joints.
- arthroplasty — surgical repair of a diseased joint
- 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.
- arthrospores — an isolated vegetative cell that has passed into a resting state, occurring in bacteria and not regarded as a true spore.
- arthrotomies — Plural form of arthrotomy.
- arthur evans — Sir Arthur John, 1851–1941, English archaeologist.
- artzybasheff — Boris Mikhailovich [bawr-is mi-kahy-luh-vich,, bor-;; Russian buh-ryees myi-khahy-luh-vyich] /ˈbɔr ɪs mɪˈkaɪ lə vɪtʃ,, ˈbɒr-;; Russian bʌˈryis myɪˈxaɪ lə vyɪtʃ/ (Show IPA), 1899–1965, U.S. illustrator and writer, born in Russia.
- ash-coloured — silver-grey in colour
- ashurbanipal — died ?626 bc, king of Assyria (?668–?626): son of Esarhaddon. He built the magnificent palace and library at Nineveh
- asphalt rock — a rock formation, usually of limestone or sandstone, containing large amounts of bitumens.
- assessorship — the occupation, post or duties of a person who assesses, advises, or estimates
- astrochemist — (chemistry, astronomy) A chemist or astronomer whose speciality is astrochemistry.
- astrophysics — Astrophysics is the study of the physical and chemical structure of the stars, planets, and other natural objects in space.
- asynchronies — a lack of synchronism or coincidence in time.
- asynchronism — a lack of synchronism; occurrence at different times
- asynchronous — An asynchronous electric machine is one in which the magnetic field and the rotation are not exactly the same.
- at a stretch — with some difficulty; by making a special effort
- at all hours — If you say that something happens at all hours of the day or night, you disapprove of it happening at the time that it does or as often as it does.
- at the press — being printed
- at the ready — If you have something at the ready, you have it in a position where it can be quickly and easily used.
- at the worst — bad or ill in the highest, greatest, or most extreme degree: the worst person.
- at this rate — If you say that at this rate something bad or extreme will happen, you mean that it will happen if things continue to develop as they have been doing.
- atharva-veda — the fourth and latest Veda, largely consisting of priestly spells and incantations
- atheoretical — having no connection with and not founded on theory
- atheromatous — a sebaceous cyst.
- atholl brose — a mixture of whisky and honey left to ferment before consumption
- athrocytosis — the capability of a cell to receive and store matter
- athwartships — from one side to the other of a vessel at right angles to the keel
- atmospherics — Atmospherics are elements in something such as a piece of music or a book which create a certain atmosphere.
- atmospherium — an optical system used to simulate images of atmospheric phenomena, as cloud formations, storms, and day and night, on the inside of a dome.
- atom smasher — accelerator (sense 3)
- attenborough — Sir David. born 1926, British naturalist and broadcaster; noted esp for his TV series Life on Earth (1978), The Living Planet (1983), The Life of Birds (1998), The Life of Mammals (2002), and First Life (2010)
- attorneyship — The office or profession of an attorney.
- auger shower — a shower of electrons, photons, etc. resulting from the collision of primary cosmic rays with atomic nuclei in the atmosphere
- australopith — (archaeology, anthropology, paleonotology) Of or pertaining to the extinct hominid primates, of the genus Australopithecus, from the Pleistocene period.
- autapomorphy — (cladistics) A derived trait that is unique to a particular taxon.
- authorizable — able to be authorized
- autochangers — Plural form of autochanger.
- autographing — Present participle of autograph.
- automorphism — the practice of seeing others as having the same characteristics as oneself
- autorhythmic — That generates its own rhythm.
- autorickshaw — (in India) a light three-wheeled vehicle driven by a motorcycle engine