15-letter words containing o, p, e, r
- pentaerythritol — a white, crystalline, water-soluble powder, C 5 H 1 2 O 4 , used chiefly in the manufacture of alkyd resins, varnishes, plasticizers, and explosives.
- pepin the short — ("Pepin the Short") died a.d. 768, king of the Franks 751–768 (father of Charlemagne).
- peppercorn rent — A peppercorn rent is an extremely low rent.
- perchloric acid — a colorless, syrupy hygroscopic liquid, HClO 4 , an acid of chlorine containing one more oxygen atom than chloric acid: used chiefly as a reagent in analytical chemistry.
- perchloroethane — hexachloroethane.
- percussion lock — a gunlock on a firearm that fires by striking a percussion cap.
- percussion tool — a power driven tool which operates by striking rapid blows: the power may be electricity or compressed air
- perfectionistic — a person who adheres to or believes in perfectionism.
- perfector press — a flatbed press for printing both sides of a sheet in one operation.
- perfluorocarbon — a fluorocarbon consisting only of fluorine and carbon atoms
- perforating gun — A perforating gun is a device used to make holes in oil and gas wells in preparation for production.
- performance art — a collaborative art form originating in the 1970s as a fusion of several artistic media, as painting, film, video, music, drama, and dance, and deriving in part from the 1960s performance happenings.
- performance car — a car that can go very fast and can increase its speed very quickly
- performing arts — dance, drama, music
- perfunctoriness — performed merely as a routine duty; hasty and superficial: perfunctory courtesy.
- pergamentaceous — (esp of plants) resembling parchment, whether in texture or composition
- period-rotation — a rather large interval of time that is meaningful in the life of a person, in history, etc., because of its particular characteristics: a period of illness; a period of great profitability for a company; a period of social unrest in Germany.
- periodic motion — any motion that recurs in identical forms at equal intervals of time.
- periodic system — a system of classification of the elements based on the periodic law.
- perissosyllabic — (of a line of verse) containing more syllables than expected for the metre being used
- permanent tooth — any of the 32 adult teeth that replace the 20 milk teeth.
- peroxide blonde — You can refer to a woman whose hair has been artificially been made lighter in colour as a peroxide blonde, especially when you want to show that you disapprove of this, or that you think her hair looks unnatural or unattractive.
- peroxysulphuric — as in peroxysulphuric acid
- person of color — the quality of an object or substance with respect to light reflected by the object, usually determined visually by measurement of hue, saturation, and brightness of the reflected light; saturation or chroma; hue.
- personal column — The personal column in a newspaper or magazine contains messages for individual people and advertisements of a private nature.
- personal estate — movable property
- personal friend — a person who is a friend, rather than a colleague or acquaintance
- personal growth — development as an individual
- personal injury — injury to an individual
- personal stereo — A personal stereo is a small cassette or CD player with very light headphones, which people carry round so that they can listen to music while doing something else.
- personalization — to have marked with one's initials, name, or monogram: to personalize stationery.
- personification — the attribution of human nature or character to animals, inanimate objects, or abstract notions, especially as a rhetorical figure.
- peter of amiens — c1050–1115, French monk: preacher of the first Crusade 1095–99.
- petit bourgeois — a person who belongs to the petite bourgeoisie.
- petroleum ether — a volatile mixture of the higher alkane hydrocarbons, obtained as a fraction of petroleum and used as a solvent
- petroleum jelly — sticky substance used as lubricant
- petty bourgeois — petit bourgeois
- pharmacotherapy — the treatment of disease through the administration of drugs.
- phenazopyridine — a substance, C 1 1 H 1 2 ClN 5 , used as a lower urinary tract analgesic.
- phenylene group — any of three bivalent, isomeric groups having the formula –C 6 H 4 –, derived from benzene by the removal of two hydrogen atoms.
- phenylketonuria — an inherited disease due to faulty metabolism of phenylalanine, characterized by phenylketones in the urine and usually first noted by signs of mental retardation in infancy.
- phenylketonuric — an inherited disease due to faulty metabolism of phenylalanine, characterized by phenylketones in the urine and usually first noted by signs of mental retardation in infancy.
- phlebosclerosis — sclerosis, or hardening, of the walls of veins.
- phloem necrosis — a disease of the American elm caused by a mycoplasmalike organism, characterized by yellowing and necrosis of the foliage and yellowish-brown discoloration of the phloem.
- phosphate group — the group or radical obtained by removal of one or more hydrogen atoms from phosphoric acid.
- phosphocreatine — a compound, C 4 H 1 0 O 5 N 3 P, found chiefly in muscle, formed by the enzymatic interaction of an organic phosphate and creatine, the breakdown of which provides energy for muscle contraction.
- phosphor bronze — a bronze, composed of about 80 percent copper, 10 percent tin, 9 percent antimony, and 1 percent phosphorus, having great hardness and resistance to corrosion.
- phosphorescence — the property of being luminous at temperatures below incandescence, as from slow oxidation in the case of phosphorus or after exposure to light or other radiation.
- phosphorylative — of or relating to phosphorylation
- photodegradable — (of a substance) capable of being broken down by light.