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15-letter words containing e, l, p

  • perpendicularly — vertical; straight up and down; upright.
  • perpetual check — a continuing series of checks resulting in a drawn game because they cannot be halted or evaded without resulting in checkmate or a serious disadvantage.
  • perseus cluster — a cluster of about 500 galaxies in the direction of the constellation Perseus, grouped around a particular Seyfert galaxy that is an intense radio source (Perseus A)
  • 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.
  • peruvian balsam — Peru balsam.
  • pessimistically — pertaining to or characterized by pessimism or the tendency to expect only bad outcomes; gloomy; joyless; unhopeful: His pessimistic outlook kept him from applying for jobs for which he was perfectly qualified.
  • peter principle — any of several satirical “laws” concerning organizational structure, especially one that holds that people tend to be promoted until they reach their level of incompetence.
  • 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
  • pheasant coucal — a brown and black, red-eyed Australian bird, Centropus phasianinus, with a pheasantlike tail.
  • phenolphthalein — a white, crystalline compound, C 2 0 H 1 4 O 4 , used as an indicator in acid-base titration and as a laxative.
  • phenomenalistic — the doctrine that phenomena are the only objects of knowledge or the only form of reality.
  • phenomenologies — the study of phenomena.
  • phenomenologist — the study of phenomena.
  • phenyl valerate — a colorless, slightly water-soluble liquid, C 1 1 H 1 4 O 2 , used chiefly in flavoring and perfumery.
  • 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.
  • phenylhydrazine — a yellow, poisonous liquid or low-melting solid, C 6 H 8 N 2 , used in chemical analysis and organic synthesis.
  • 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.
  • philip the bold — 1342–1404, duke of Burgundy (1363–1404), noted for his courage at Poitiers (1356) in the Hundred Years' War: regent of France for his nephew Charles VI (1368–88, 1392–1404)
  • philip the good — 1396–1467, duke of Burgundy 1419–67.
  • 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.
  • phoenix islands — a group of eight coral islands in the central Pacific: administratively part of Kiribati. Area: 28 sq km (11 sq miles). The islands and surrounding waters form the Phoenix Islands Protected Area, the world's largest marine protected area. Area: 410 500 sq km (158 500 sq miles)
  • phosphorylative — of or relating to phosphorylation
  • photodegradable — (of a substance) capable of being broken down by light.
  • photoelasticity — the phenomenon of double refraction of polarized light by a transparent substance under elastic stress, used to measure strain in elastic, transparent materials.
  • photoelectronic — relating to electronic effects or devices affected by light
  • photoheliograph — an instrument for photographing the sun, consisting of a camera and a specially adapted telescope.
  • photomechanical — noting or pertaining to any of various processes for printing from plates or surfaces prepared by the aid of photography.
  • photomultiplier — an extremely sensitive detector of light and of other radiation, consisting of a tube in which the electrons released by radiation striking a photocathode are accelerated, greatly amplifying the signal obtainable from small quantities of radiation.
  • phototelegraphy — facsimile (def 2a).
  • phototheodolite — an optical tracking instrument consisting of a camera and theodolite mounted on a single tripod, used in photogrammetry and in tracking rockets.
  • phrenologically — in a manner relating to phrenology
  • physical change — a usually reversible change in the physical properties of a substance, as size or shape: Freezing a liquid is a physical change.
  • physical memory — (memory management)   The memory hardware (normally RAM) installed in a computer. The term is only used in contrast to virtual memory.
  • physicochemical — physical and chemical: the physicochemical properties of an isomer.
  • phytochemically — in a phytochemical manner
  • phytoflagellate — any microscopic flagellate that is photosynthetic.
  • pick-and-shovel — marked by drudgery; laborious: the pick-and-shovel work necessary to get a political campaign underway.
  • pickaback plane — a powered airplane designed to be carried aloft by another airplane and released in flight.
  • picture element — (graphics)   (pixel) The smallest resolvable rectangular area of an image, either on a screen or stored in memory. Each pixel in a monochrome image has its own brightness, from 0 for black to the maximum value (e.g. 255 for an eight-bit pixel) for white. In a colour image, each pixel has its own brightness and colour, usually represented as a triple of red, green and blue intensities (see RGB). Compare voxel.
  • picture gallery — place where art is exhibited and sold
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