14-letter words containing p, o, t, s, i
- pay television — a commercial service that broadcasts or provides television programs to viewers who pay a monthly charge or a per-program fee.
- peacock's tail — a handsome brown seaweed, Padina pavonia (though coloured yellow-olive, red, and green) whose fan-shaped fronds have concentric bands of iridescent hairs
- pentecostarion — a service book of offices for the period from Easter to the Sunday after Pentecost.
- peremptoriness — leaving no opportunity for denial or refusal; imperative: a peremptory command.
- period costume — the attire typical of a particular period in time
- peritoneoscopy — an endoscopy examining the peritoneal cavity
- peritrichously — in a peritrichous manner; in a fashion characteristic of a peritrichous organism
- persian violet — any of several plants belonging to the genus Exacum, native to the Old World, as E. affine, having glossy, ovate leaves, and fragrant, bluish flowers: cultivated as a houseplant.
- pertinaciously — holding tenaciously to a purpose, course of action, or opinion; resolute.
- petrochemicals — substances, such as acetone or ethanol, obtained from petroleum or natural gas
- petrochemistry — the branch of chemistry dealing with petroleum or its products.
- petrol station — A petrol station is a garage by the side of the road where petrol is sold and put into vehicles.
- petrophysicist — a person who studies, or is an expert in, petrophysics
- phallocentrism — a doctrine or belief centered on the phallus, especially a belief in the superiority of the male sex.
- phantasmagoria — a shifting series of phantasms, illusions, or deceptive appearances, as in a dream or as created by the imagination.
- phantasmagoric — having a fantastic or deceptive appearance, as something in a dream or created by the imagination.
- pharmacologist — the science dealing with the preparation, uses, and especially the effects of drugs.
- pharmacopolist — a person who sells pharmaceutical products
- phase velocity — the velocity with which a simple harmonic wave is propagated, equal to the wavelength divided by the period of vibration.
- philanthropist — a person who practices philanthropy.
- philosophaster — a person who has only a superficial knowledge of philosophy or who feigns a knowledge he or she does not possess.
- philosophistic — relating to a person who affects philosophical knowledge or to an affectation to philosophical knowledge or the action or enjoyment of carrying this out
- phonochemistry — the branch of chemistry concerned with the chemical effects of sound and ultrasonic waves
- phosphoprotein — a protein, as casein or ovalbumin, in which one or more hydroxyl groups of serine, threonine, or tyrosine are hydroxylated.
- phosphorolytic — of or relating to phosphorolysis
- photocatalysis — the acceleration or retardation of the reaction rate in chemical reactions by light.
- photochemistry — the branch of chemistry that deals with the chemical action of light.
- photofinishing — the act or occupation of developing films, printing photographs, etc.
- photogeologist — a person who studies or has a profession in photogeology
- photoluminesce — to produce photoluminescence
- photoperiodism — the response, as affecting growth or reproduction, of an organism to the length of exposure to light in a 24-hour period.
- photorealistic — 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.
- photoresistive — photoconductive
- photosensitive — sensitive to light or similar radiation.
- photosensitize — to make (a material) photosensitive, as by the application of a photosensitive emulsion.
- photosynthesis — the complex process by which carbon dioxide, water, and certain inorganic salts are converted into carbohydrates by green plants, algae, and certain bacteria, using energy from the sun and chlorophyll.
- photosynthetic — the complex process by which carbon dioxide, water, and certain inorganic salts are converted into carbohydrates by green plants, algae, and certain bacteria, using energy from the sun and chlorophyll.
- phyllosilicate — any silicate mineral having the tetrahedral silicate groups linked in sheets, each group containing four oxygen atoms, three of which are shared with other groups so that the ratio of silicon atoms to oxygen atoms is two to five.
- phytochemistry — the branch of biochemistry dealing with plants and plant processes.
- phytosociology — the branch of ecology dealing with the origin, composition, structure, and classification of plant communities.
- piezochemistry — the study of chemical reactions at high pressures
- pigeon-chested — having a narrow chest that sticks out at the front in an unusual way
- pimento cheese — a processed cheese made from Neufchâtel, cream cheese, Cheddar, or other cheese, flavored with chopped pimientos.
- piston-engined — powered by a piston engine
- pitch invasion — If there is a pitch invasion during or after a football, rugby, or cricket match, fans run on to the pitch.
- pitch-and-toss — a game in which players toss coins at a mark, the person whose coin hits closest to the mark tossing all the coins in the air and winning all those that come down heads up.
- plastic memory — the tendency of certain plastics after being deformed to resume their original form when heated
- plastic police — a collective term for several classes of public officer (including community support officers) authorized to perform certain tasks and duties in support of the police force, but having lesser powers than the police
- plasticization — Plasticization is the process of changing the structure of a polymer to make it easier to bend.
- platonic solid — one of the five regular polyhedrons: tetrahedron, octahedron, hexahedron, icosahedron, or dodecahedron.