12-letter words containing t, r, o, p, a
- perforations — the holes punched that allow individual stamps, coupons, etc to be easily separated
- performative — (of an expression or statement) performing an act by the very fact of being uttered, as with the expression “I promise,” that performs the act of promising.
- perinatology — a field of medicine focusing on problems emerging during the perinatal period.
- periostracum — the external, chitinlike covering of the shell of certain mollusks that protects the limy portion from acids.
- peristomatic — surrounding a leaf's stoma or stomata
- peritoneally — through the peritoneum
- pernoctation — the act of staying all night in a place, esp for prayer or as a vigil
- perorational — of, pertaining to, or characteristic of a peroration
- peroxidation — a type of reaction in which oxygen atoms are formed leading to the production of peroxides. It is stimulated in the body by certain toxins and infections
- peroxyborate — perborate.
- perpetration — to commit: to perpetrate a crime.
- perpetuation — to make perpetual.
- perseverator — a person who perseverates
- persian knot — a hand-tied knot, used in rug weaving, in which the ends of yarn looped around a warp thread appear at each of the interstices between adjacent threads and produce a compact and relatively even pile effect.
- 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.
- 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.
- 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.
- petrodollars — Petrodollars are a unit of money used to calculate how much a country has earned by exporting petroleum or natural gas.
- petrol gauge — a gauge that indicates the amount of petrol left in the tank of a vehicle
- 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
- 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.
- photo spread — a picture spread. See under spread (def 33).
- 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.
- photonuclear — of, relating to, or caused by the collision of high-energy photons with the nucleus of an atom.
- 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.
- 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.
- physogastric — pertaining to the swollen, membranous abdomen of certain insects, especially termite and ant queens.
- phytographer — a botanist involved with plant description
- phytophthora — any of a group of fungi of the genus Phytophthora, which cause a serious plant disease, especially affecting apple and pear trees and potatoes.
- phytotherapy — the use of plants and plant products for medicinal purposes
- pictographic — a pictorial sign or symbol.
- pictorialism — Fine Arts. the creation or use of pictures or visual images, especially of recognizable or realistic representations.
- pictorialist — Fine Arts. the creation or use of pictures or visual images, especially of recognizable or realistic representations.
- pictorialize — to make pictorial; illustrate or represent with or as if with pictures.