15-letter words containing r, o, t, h, e
- palaeoanthropic — relating to palaeoanthropology
- palaeontography — the branch of palaeontology concerned with the description of fossils
- paraheliotropic — (of leaves) turning away from light; sun-avoiding
- parthenogenesis — development of an egg without fertilization.
- parthenogenetic — development of an egg without fertilization.
- passport holder — a person who has a passport
- patagonian hare — a burrowing, gray, long-eared and long-legged cavy of the genus Dolichotis, native to South America.
- pavel petrovich — Paul I (def 2).
- peacock feather — a (distinctive and brightly coloured) feather from the peacock
- 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).
- perchloroethane — hexachloroethane.
- permanent tooth — any of the 32 adult teeth that replace the 20 milk teeth.
- 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.
- 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.
- 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.
- 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
- 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.
- 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
- 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.
- propeller shaft — a shaft that transmits power from an engine to a propeller.
- property rights — a legal right to or in a particular property.
- protonephridium — a tubular, excretory structure in certain invertebrates, as flatworms, rotifers, and some larvae, usually ending internally in flame cells and having an external pore
- pseudoarthrosis — a joint formed by fibrous tissue bridging the gap between the two fragments of bone of an old fracture that have not united