19-letter words containing h, a, r, d, o
- pyrophosphoric acid — a crystalline, water-soluble powder, H 4 P 2 O 7 , formed by the union of one molecule of phosphorus pentoxide with two molecules of water.
- radiochromatography — chromatography in which radiolabeled substances on the chromatogram are determined quantitatively or qualitatively by measuring their radioactivity.
- radiopharmaceutical — any of a number of radioactive drugs used diagnostically or therapeutically.
- ralph waldo emerson — Ralph Waldo [wawl-doh,, wol-] /ˈwɔl doʊ,, ˈwɒl-/ (Show IPA), 1803–82, U.S. essayist and poet.
- rancho palos verdes — a town in SW California.
- rapture of the deep — nitrogen narcosis.
- red-shouldered hawk — a North American hawk, Buteo lineatus, having rufous shoulders.
- regular icosahedron — an icosahedron in which each of the faces is an equilateral triangle
- removable hard disk — (storage) A type of magnetic disk, or possibly magneto-optical disk which is not permanently attached to the disk drive (not a fixed disk) but which can be taken out and replaced, allowing many disks to be used in the same drive. The term "removable disk" would seem to be applicable to floppy disks but is generally reserved for hard disks in suitable cartridges such as those made by Syquest, Iomega and others. Removable disk packs were common on minicomputers such as the PDP-11 in use in the 1970s except that the drives were the size of washing machines and the disk packs as big as car wheels. Removable disks became popular on microcomputers in the 1990s as a cheap way of expanding disk space, transporting large amounts of data between computers and storing backups. Large, cheap fixed hard disks and USB memory sticks have made removable disks less attractive.
- reticuloendothelial — pertaining to, resembling, or involving cells of the reticuloendothelial system.
- rhodesian ridgeback — a large short-haired breed of dog characterized by a ridge of hair growing along the back in the opposite direction to the rest of the coat. It was originally a hunting dog from South Africa
- saber-toothed tiger — any of several extinct members of the cat family Felidae from the Oligocene to Pleistocene Epochs, having greatly elongated, saberlike upper canine teeth.
- sabre-toothed tiger — any of various extinct Tertiary felines of the genus Smilodon and related genera, with long curved upper canine teeth
- saccharolactic acid — mucic acid.
- sandwich generation — the generation of people still raising their children while having to care for their aging parents.
- sharp-tailed grouse — a grouse, Pedioecetes phasianellus, of prairies and open forests of western North America, similar in size to the prairie chicken but with a more pointed tail.
- ship-to-shore radio — a radio that carries communications between land and sea
- sidereal hour angle — the angle, measured westward through 360°, between the hour circle passing through the vernal equinox and the hour circle of a celestial body.
- simple carbohydrate — a carbohydrate, as glucose, that consists of a single monosaccharide unit.
- south african dutch — the Boers.
- spread oneself thin — to draw, stretch, or open out, especially over a flat surface, as something rolled or folded (often followed by out).
- stakeholder pension — In Britain, a stakeholder pension is a flexible pension scheme with low charges. Both employees and the state contribute to the scheme, which is optional, and is in addition to the basic state pension.
- standard atmosphere — an arbitrarily determined vertical distribution of atmospheric pressure, temperature, and density, assumed to have physical constants and conforming to parametric equations, used for calculations in ballistics, the design of pressure altimeters, etc.
- steady state theory — a theory in which the universe is assumed to have average properties that are constant in space and time so that new matter must be continuously and spontaneously created to maintain average densities as the universe expands.
- steady-state theory — a cosmological theory postulating that the universe exists throughout time in a steady state such that the average density of matter does not vary with distance or time. Matter is continuously created in the space left by the receding stars and galaxies of the expanding universe
- straight and narrow — the way of virtuous or proper conduct: After his release from prison, he resolved to follow the straight and narrow.
- straightforwardness — going or directed straight ahead: a straightforward gaze.
- take care to do sth — If you take care to do something, you make sure that you do it.
- the admiralty board — (formerly) a department of the British Ministry of Defence, responsible for the administration and planning of the Royal Navy
- the almighty dollar — money regarded figuratively as a god, or source of great power
- the end of the road — If a process or person has reached the end of the road, they are unable to progress any further.
- the golden triangle — an opium-producing area of SE Asia, comprising parts of Myanmar, Laos, and Thailand
- the hampshire downs — a range of low chalk hills that crosses Hampshire in S England
- theatrical producer — a person who is responsible for all aspects of a theatrical production
- theodore von karman — Theodore, 1881–1963, U.S. scientist and aeronautical engineer, born in Hungary.
- thiophosphoric acid — an acid derived from phosphoric acid by substituting one or more sulfur atoms for oxygen atoms.
- third international — an international organization (1919–43), founded in Moscow, uniting Communist groups of various countries and advocating the attainment of their ends by violent revolution. Also called Comintern, Communist International. Compare international (def 6).
- third law of motion — any of three laws of classical mechanics, either the law that a body remains at rest or in motion with a constant velocity unless an external force acts on the body (first law of motion) the law that the sum of the forces acting on a body is equal to the product of the mass of the body and the acceleration produced by the forces, with motion in the direction of the resultant of the forces (second law of motion) or the law that for every force acting on a body, the body exerts a force having equal magnitude and the opposite direction along the same line of action as the original force (third law of motion or law of action and reaction)
- three-point landing — an aircraft landing in which the two wheels of the main landing gear and the tail or nose wheel touch the ground simultaneously.
- threshold agreement — an agreement between an employer and employees or their union to increase wages by a specified sum if inflation exceeds a specified level in a specified time
- through and through — in at one end, side, or surface and out at the other: to pass through a tunnel; We drove through Denver without stopping. Sun came through the window.
- throw cold water on — having a relatively low temperature; having little or no warmth: cold water; a cold day.
- throw in one's hand — (in cards) to concede defeat by putting one's cards down
- throw sth overboard — If you throw something overboard, for example an idea or suggestion, you reject it completely.
- to be headquartered — to be based; to have headquarters (in a place)
- to be off the radar — to no longer be noticed or important
- to change your mind — If you change your mind, or if someone or something changes your mind, you change a decision you have made or an opinion that you had.
- to hang by a thread — If you say that something is hanging by a thread, you mean that it is in a very uncertain state and is unlikely to survive or succeed.
- to hold your breath — If you hold your breath, you make yourself stop breathing for a few moments, for example because you are under water.
- to play hard to get — If someone plays hard to get, they pretend not to be interested in another person or in what someone is trying to persuade them to do.