18-letter words containing s, p
- photodecomposition — the breaking down of molecules by radiant energy.
- photoisomerization — isomerization induced by light.
- photomorphogenesis — plant development that is controlled by light.
- photosensitization — to make (a material) photosensitive, as by the application of a photosensitive emulsion.
- physical chemistry — the branch of chemistry dealing with the relations between the physical properties of substances and their chemical composition and transformations.
- physical education — systematic instruction in sports, exercises, and hygiene given as part of a school or college program.
- physical geography — the branch of geography concerned with natural features and phenomena of the earth's surface, as landforms, drainage features, climates, soils, and vegetation.
- physical inventory — To carry out a physical inventory is to count all the stock on hand.
- physical therapist — sb who performs physiotherapy
- pick up the pieces — deal with aftermath
- piecewise function — a function whose definition changes depending on the value of the independent variable
- pigmy hippopotamus — a related but smaller animal, Choeropsis liberiensis
- pilgrim's progress — an allegory (1678) by John Bunyan.
- pilotless aircraft — an aircraft equipped for operation by radio or by robot control, without a human pilot aboard; drone.
- pilotless ignition — a system for igniting a gas burner, as in a gas range, furnace, or boiler, without the use of a pilot light.
- pine tree shilling — a silver coin minted in Massachusetts in the mid to late 17th century, named for the pine tree within a circle shown on the obverse side.
- pitch-and-run shot — chip shot.
- pitt-rivers museum — a museum in Oxford that houses a major anthropological collection of tools and weapons assembled by Augustus Henry Lane Fox Pitt-Rivers
- plains grasshopper — a large, destructive short-horned grasshopper, Brachystola magna, of the western U.S., marked by pinkish hind wings.
- plate-glass window — a window that has glass which has been formed by rolling
- play cat and mouse — Also called cat and rat. a children's game in which players in a circle keep a player from moving into or out of the circle and permit a second player to move into or out of the circle to escape the pursuing first player.
- play second fiddle — be considered less important
- play silly buggers — to fool around and waste time
- play someone false — to deceive, cheat, hoodwink, or betray someone
- pleasure principle — an automatic mental drive or instinct seeking to avoid pain and to obtain pleasure.
- plight one's troth — to make a promise of marriage
- plumber's merchant — a shop or business that sells things needed for the job of installing and repairing pipes, fixtures, etc, for water, drainage, and gas
- point set topology — topology (def 2).
- policeman's helmet — a Himalayan balsaminaceous plant, Impatiens glandulifera, with large purplish-pink flowers, introduced into Britain
- political prisoner — sb imprisoned for political dissidence
- political question — a question regarded by the courts as being a matter to be determined by another department of government rather than of law and therefore one with which they will not deal, as the recognition of a foreign state.
- polynesian tattler — a sandpiper, H. incanus, native to the Pacific coastal regions
- polystyrene cement — a purpose-made adhesive for fixing rigid polystyrene
- population density — ratio: inhabitants to area
- population figures — population totals; statistics relating to the size of populations
- porter-house steak — Also called porterhouse steak. a choice cut of beef from between the prime ribs and the sirloin.
- portuguese guinean — of or relating to Portuguese Guinea, a former name for Guinea-Bissau, or its inhabitants
- positively charged — having a positive charge
- possessive pronoun — See at possessive (def 4a).
- post-impressionism — a varied development of Impressionism by a group of painters chiefly between 1880 and 1900 stressing formal structure, as with Cézanne and Seurat, or the expressive possibilities of form and color, as with Van Gogh and Gauguin.
- post-revolutionary — of, pertaining to, characterized by, or of the nature of a revolution, or a sudden, complete, or marked change: a revolutionary junta.
- postal storage car — a railroad car for transporting unsorted mail.
- postmaster general — the executive head of the postal system of a country.
- postmillenarianism — postmillennialism.
- postviral syndrome — debilitating condition occurring as a sequel to viral illness
- potassium chlorate — a white or colorless, crystalline, water-soluble, poisonous solid, KClO 3 , used chiefly as an oxidizing agent in the manufacture of explosives, fireworks, matches, bleaches, and disinfectants.
- potassium chloride — a white or colorless, crystalline, water-soluble solid, KCl, used chiefly in the manufacture of fertilizers and mineral water, and as a source of other potassium compounds.
- potassium fluoride — a white, crystalline, hygroscopic, toxic powder, KF, used chiefly as an insecticide, a disinfectant, and in etching glass.
- potassium myronate — sinigrin.
- potassium sulphate — a soluble substance usually obtained as colourless crystals of the decahydrate: used in making glass and as a fertilizer. Formula: K2SO4