15-letter words containing h, a, r, p
- paedophile ring — a group of people who take part in illegal sexual activity involving children
- pairs champions — competitors in or winners of a pairs championship
- palaeoanthropic — relating to palaeoanthropology
- palaeogeography — the study of geographical features of the geological past
- palaeontography — the branch of palaeontology concerned with the description of fossils
- panoramic sight — an artillery sight that can be rotated horizontally in a full circle.
- paracetaldehyde — paraldehyde.
- parachute brake — a parachute opened horizontally from the tail of an airplane upon landing, used as an aid in braking. Also called parabrake. Compare drogue parachute (def 2).
- paraffin heater — a heater which is fuelled by paraffin
- paraheliotropic — (of leaves) turning away from light; sun-avoiding
- parasympathetic — pertaining to that part of the autonomic nervous system consisting of nerves and ganglia that arise from the cranial and sacral regions and function in opposition to the sympathetic system, as in inhibiting heartbeat or contracting the pupil of the eye.
- parchment paper — a waterproof and grease-resistant paper produced by treating ordinary paper with concentrated sulfuric acid.
- parenthetically — of, pertaining to, noting, or of the nature of a parenthesis: several unnecessary parenthetic remarks.
- parhelic circle — a white, horizontal band passing through the sun, either incomplete or extending around the horizon, produced by the reflection of the sun's rays from the vertical faces of ice prisms in the atmosphere.
- parish magazine — a magazine containing news and articles of interest to the people of a particular parish church or the local area
- parish register — the register of the christenings, marriages, and burials in a parish.
- parmesan cheese — of or from Parma, in northern Italy.
- paroemiographer — a person who writes or collects proverbs
- parthenogenesis — development of an egg without fertilization.
- parthenogenetic — development of an egg without fertilization.
- pass-the-parcel — a children's game in which a parcel with lots of wrappings is passed round while music plays; each time the music stops the person holding the parcel takes a layer of wrapping off
- passenger coach — a carriage in which passengers sit
- 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.
- patchwork quilt — cover sewn from patches of cloth
- pavel petrovich — Paul I (def 2).
- peacock feather — a (distinctive and brightly coloured) feather from the peacock
- penshurst place — a 14th-century mansion near Tunbridge Wells in Kent: birthplace of Sir Philip Sidney; gardens laid out from 1560
- 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.
- 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.
- 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.
- personal growth — development as an individual
- peter the great — ("the Great") 1672–1725, czar of Russia 1682–1725.
- phantom circuit — a circuit derived from two suitably arranged pairs of wires, each pair being a circuit (side circuit) and also acting as one half of an additional derived circuit, the entire system providing the capabilities of three circuits while requiring wires for only two.
- pharmacological — the science dealing with the preparation, uses, and especially the effects of drugs.
- 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.
- phenyl valerate — a colorless, slightly water-soluble liquid, C 1 1 H 1 4 O 2 , used chiefly in flavoring and perfumery.
- 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.
- philanthropical — of, pertaining to, engaged in, or characterized by philanthropy; benevolent: a philanthropic foundation.
- phonautographic — relating to a phonautograph or a piece of equipment that records sound visually by detecting the sound waves and indicating them on a graph
- phonocardiogram — the graphic record produced by a phonocardiograph.
- phonogramically — in a phonogramic manner
- 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.
- phosphoric acid — any of three acids, orthophosphoric acid, H 3 PO 4 , metaphosphoric acid, HPO 3 , or pyrophosphoric acid, H 4 P 2 O 7 , derived from phosphorus pentoxide, P 2 O 5 , and various amounts of water.
- phosphorylation — to introduce the phosphoryl group into (an organic compound).