12-letter words containing t, r, o, p
- perspiration — a salty, watery fluid secreted by the sweat glands of the skin, especially when very warm as a result of strenuous exertion; sweat.
- perspiratory — of, relating to, or stimulating perspiration.
- pertinacious — holding tenaciously to a purpose, course of action, or opinion; resolute.
- perturbation — the act of perturbing.
- pest control — rats, insects: extermination
- pester power — the ability possessed by a child to nag a parent relentlessly until the parent succumbs and agrees to the child's request
- pet passport — a document that officially records information related to a specific animal, as part of a scheme that allows animals to travel between member countries without undergoing quarantine
- petaliferous — bearing or having petals.
- peterborough — a city in Cambridgeshire, in central England.
- petrifaction — the act or process of petrifying; the state of being petrified.
- petrobrusian — a member of a 12th-century sect in S France that rejected the Mass, infant baptism, prayers for the dead, sacerdotalism, the veneration of the cross, and the building of churches.
- petrobutanol — butyl alcohol.
- petrochemist — someone who studies petrochemistry or works in the petrochemical industry
- petrodollars — Petrodollars are a unit of money used to calculate how much a country has earned by exporting petroleum or natural gas.
- petrogenesis — the branch of petrology dealing with the origin and formation of rocks.
- petrogenetic — relating to petrogenesis
- petroglyphic — relating to or having the characteristics of a petroglyph or carving made in rock
- petrol gauge — a gauge that indicates the amount of petrol left in the tank of a vehicle
- petrophysics — the analysis of the constitution and characteristics of rocks
- petrozavodsk — a city in NW Russia, capital of the Karelian Autonomous Republic, on Lake Onega: developed around ironworks established by Peter the Great in 1703; university (1940). Pop: 265 000 (2005 est)
- phallocratic — relating to a male, or the beliefs assumed by such, who assumes authority over females due to his maleness
- phanerophyte — a tree or shrub that bears its perennating buds more than 25 cm above the level of the soil
- pharmacolite — hydrous calcium arsenate, 2CaO⋅As 2 O 5 ⋅5H 2 O, formed by natural alteration of mineral deposits containing arsenopyrite and arsenical ores of cobalt and silver.
- pharyngotomy — surgical incision into the pharynx
- phenocrystic — relating to a phenocryst
- philanthropy — altruistic concern for human welfare and advancement, usually manifested by donations of money, property, or work to needy persons, by endowment of institutions of learning and hospitals, and by generosity to other socially useful purposes.
- phosphaturia — the presence of an excessive quantity of phosphates in the urine.
- phosphoreted — phosphureted.
- phosphureted — combined with phosphorus, especially in its lowest valence state.
- photo relief — a method of showing the configuration of the relief of an area by photographing a model of it that is illuminated by a lamp in the northwest corner
- photo spread — a picture spread. See under spread (def 33).
- photochromic — (of chemically treated glass or plastic) capable of darkening or changing color when exposed to light.
- photocurrent — an electric current produced by a photoelectric effect.
- photoengrave — to make a photoengraving of.
- photographer — a person who takes photographs, especially one who practices photography professionally.
- photographic — of or relating to photography.
- photogravure — any of various processes, based on photography, by which an intaglio engraving is formed on a metal plate, from which ink reproductions are made.
- photoneutron — a neutron emitted from a nucleus during photodisintegration.
- photonuclear — of, relating to, or caused by the collision of high-energy photons with the nucleus of an atom.
- photopolymer — a polymer or plastic that undergoes a change in physical or chemical properties when exposed to light.
- photoproduct — any product which is produced by a chemical reaction that uses light or other electromagnetic radiation to increase energy of particles
- photorealism — a style of painting flourishing in the 1970s, especially in the U.S., England, and France, and depicting commonplace scenes or ordinary people, with a meticulously detailed realism, flat images, and barely discernible brushwork that suggests and often is based on or incorporates an actual photograph.
- phototherapy — treatment of disease, especially of the skin, by means of light rays.
- photothermic — pertaining to the thermal effects of light.
- phototrophic — any organism that uses light as its principal source of energy.
- phototropism — phototropic tendency or growth.
- phragmoplast — the cytoplasmic structure that forms at the equator of the spindle after the chromosomes have divided during the anaphase of plant mitosis, and that initiates cell division.
- phreatophyte — a long-rooted plant that absorbs its water from the water table or the soil above it.
- phrenologist — a psychological theory or analytical method based on the belief that certain mental faculties and character traits are indicated by the configurations of the skull.
- phrontistery — a place or establishment for thinking, studying, or learning