15-letter words containing r, h, a, t
- at arm's length — If you hold something at arm's length, you hold it away from your body with your arm straight.
- at death's door — If you say that someone is at death's door, you mean they are very ill indeed and likely to die.
- at full stretch — If you are at full stretch, your arm is straight and extended as far as possible, usually because you are trying to reach something that is almost too far away.
- at right angles — If two things are at right angles, they are situated so that they form an angle of 90° where they touch each other. You can also say that one thing is at right angles to another.
- at short notice — Notice is used in expressions such as 'at short notice', 'at a moment's notice' or 'at twenty-four hours' notice', to indicate that something can or must be done within a short period of time.
- at the controls — If someone is at the controls of a machine or other piece of equipment, they are operating it.
- at the earliest — At the earliest means not before the date or time mentioned.
- at the mercy of — in the power of
- atherosclerosis — a degenerative disease of the arteries characterized by patchy thickening of the inner lining of the arterial walls, caused by deposits of fatty material; a form of arteriosclerosis
- atherosclerotic — Of, pertaining to, or afflicted with atherosclerosis.
- athlete's heart — enlargement of the heart, caused by continued, heavy physical exertion
- athletic sports — sports, esp track and field events, in which athleticism is required
- atmospherically — pertaining to, existing in, or consisting of the atmosphere: atmospheric vapors.
- austria-hungary — the Dual Monarchy established in 1867, consisting of what are now Austria, Hungary, the Czech Republic, Slovakia, Slovenia, Croatia, and Bosnia-Herzegovina, and parts of Poland, Romania, Ukraine, and Italy. The empire was broken up after World War I
- authoritatively — having due authority; having the sanction or weight of authority: an authoritative opinion.
- autobiographers — Plural form of autobiographer.
- autobiographies — Plural form of autobiography.
- autolithography — a lithographic technique by which the artist draws or traces with a brush and pen directly on a stone or plate.
- automata theory — the formal study of the power of computation of abstract machines
- automorphically — in an automorphic manner
- autoradiographs — Plural form of autoradiograph.
- autoradiography — the technique or process of making autoradiographs.
- autorhythmicity — The quality of being autorhythmic, or generating its own rhythm, as for example the cells of the cardiac muscle do.
- autotrophically — through an autotrophic process
- back-scratching — a reciprocal exchange of favors, aid, or compliments
- baconian theory — the theory attributing the authorship of Shakespeare's plays to Francis Bacon.
- bacterial ghost — a bacterial cell that is emptied and filled artificially with another substance
- bacteriophagous — Pertaining to the predation and consumption of bacterium.
- bargain-hunting — the act of shopping for items sold at cheap, esp discounted, prices
- barium chromate — a yellow, crystalline compound, BaCrO 4 , used as a pigment (barium yellow)
- barium sulphate — a white insoluble fine dense powder, used as a pigment, as a filler for paper, rubber, etc, and in barium meals. Formula: BaSO4
- barothermograph — an automatic instrument for recording pressure and temperature.
- bathroom scales — scales typically kept in a bathroom for people to weigh themselves
- bathurst island — an island off the coast of N Nunavut, Canada, in the Arctic Archipelago: present south of the North Magnetic Pole nearby. 7609 sq. mi. (19,707 sq. km).
- bathymetrically — In a bathymetric way.
- bathythermogram — a record made by a bathythermograph.
- battery charger — a device that can restore the charge to a battery, usually by means of electricity
- battle hardened — toughened by the experience of battle
- battleship gray — a subdued bluish gray.
- beet leafhopper — a small leafhopper (Circulifer tenellus) that transmits a very destructive virus to sugar beets
- before the fact — before the commission of the offence
- before the mast — as an apprentice seaman
- beside the mark — not striking the point aimed at
- big bang theory — In astronomy the big bang theory is a theory that suggests that the universe was created as a result of an extremely large explosion.
- biostratigraphy — the examination of the ages of rock strata by using fossils
- bipartite graph — complete graph
- birch partridge — ruffed grouse
- board of health — an agency with responsibility for health in state, country, etc
- bohemian forest — a mountain range between the SW Czech Republic and SE Germany. Highest peak: Arber, 1457 m (4780 ft)
- brachistochrone — the curve between two points through which a body moves under the force of gravity in a shorter time than for any other curve; the path of quickest descent