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15-letter words containing r, h, e, o

  • 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.
  • permanent tooth — any of the 32 adult teeth that replace the 20 milk teeth.
  • peroxysulphuric — as in peroxysulphuric acid
  • personal growth — development as an individual
  • petroleum ether — a volatile mixture of the higher alkane hydrocarbons, obtained as a fraction of petroleum and used as a solvent
  • 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.
  • 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.
  • photomicroscope — a microscope having an illuminator and a camera mechanism for producing a photomicrograph.
  • 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.
  • photorefractive — of or relating to a change in the index of refraction by spatial variations of the light intensity, as in a laser.
  • photosensitizer — a drug, food, or other chemical that increases sensitivity to light and other visible photons
  • phototelegraphy — facsimile (def 2a).
  • phototypesetter — a machine for phototypesetting
  • phrasemongering — the act of coining memorable phrases
  • phrenologically — in a manner relating to phrenology
  • physical memory — (memory management)   The memory hardware (normally RAM) installed in a computer. The term is only used in contrast to virtual memory.
  • physiotherapist — physical therapy.
  • pinochet ugarte — Augusto [ou-goos-taw] /aʊˈgus tɔ/ (Show IPA), 1915–2006, Chilean army general and political leader: president 1973–90.
  • pistachio green — a light or medium shade of yellow green.
  • pithecanthropus — a former genus of extinct hominids whose members have now been assigned to the proposed species Homo erectus.
  • pleochroic halo — a dark-colored, microscopic ring around a minute radioactive particle in certain mineral crystals, used in estimating the age of the rocks containing these crystals
  • plethysmography — the tracking of changes measured in bodily volume
  • pneumatotherapy — the use of compressed or rarefied air in treating disease.
  • poikilothermism — the state or quality of being cold-blooded, as fishes and reptiles.
  • polychlorinated — having multiple chlorine atoms
  • polychloroprene — a chloroprene polymer
  • pontine marshes — an area of W Italy, southeast of Rome: formerly malarial swamps, drained in 1932–34 after numerous attempts since 160 bc had failed
  • posthemorrhagic — occurring after a haemorrhage
  • posthole digger — a tool or device for digging a posthole.
  • postsynchronize — to add sound, such as dubbing, to a film or video after shooting is completed
  • potash feldspar — any of the feldspar minerals having the composition KAlSi 3 O 8 , as orthoclase.
  • power macintosh — Power Mac
  • probationership — the position of a probationer
  • process heating — Process heating is heating, usually from steam, which is used to increase the temperature in a process vessel.
  • progress chaser — a person employed to make sure at each stage, esp of a manufacturing process, that a piece of work is on schedule and is delivered to the customer on time
  • propeller shaft — a shaft that transmits power from an engine to a propeller.
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