13-letter words containing p, r, o, t, a
- plagiotropism — plagiotropic tendency or growth.
- plain yoghurt — natural yoghurt, without added flavouring
- plane spotter — a person who observes, photographs, and catalogues aircraft as a hobby
- plant hormone — an organic chemical, as auxin, produced by plant cells and functioning at various sites to regulate growth, turning, metabolic processes, etc.
- platform game — a type of computer game that is played by moving a figure on the screen through a series of obstacles and problems
- platform shoe — a shoe with a platform.
- platiniferous — platinum-bearing
- platonic year — a period of about 26,000 years, equal to the time required for a complete revolution of the equinoxes.
- platykurtosis — the state of being platykurtic.
- play for time — a dramatic composition or piece; drama.
- pleasure boat — recreational vessel
- plethysmogram — the recording of a plethysmograph.
- plural voting — right to vote more than once
- pluralization — to receive or take a plural form.
- pneumatograph — pneumograph.
- pneumatometer — an instrument for measuring either the quantity of air inhaled or exhaled during a single inspiration or expiration or the force of inspiration or expiration.
- pneumatophore — Botany. a specialized structure developed from the root in certain plants growing in swamps and marshes, serving as a respiratory organ.
- pneumogastric — of or relating to the lungs and stomach.
- pocket-square — a handkerchief, often colored or figured, worn in the breast pocket of a suit or blazer as a fashion accessory.
- pococurantism — a careless or indifferent person.
- pococurantist — a person who demonstrates a tendency toward indifference
- poet laureate — (in Great Britain) a poet appointed for life as an officer of the royal household, formerly expected to write poems in celebration of court and national events.
- pointe claire — a city in S Quebec, in E Canada, near Montreal, on the St. Lawrence.
- polyarteritis — inflammation of the layers of an artery or of many arteries, usually caused by a severe hypersensitivity reaction, and characterized by nodules and hemorrhage along the involved vessels.
- polyarthritis — arthritis occurring in more than one joint.
- polyarticular — pertaining to or affecting many joints.
- polycarbonate — a synthetic thermoplastic resin, a linear polymer of carbonic acid, used for molded products, films, and nonbreakable windows.
- polychromatic — having or exhibiting a variety of colors.
- pontchartrain — Lake, a shallow extension of the Gulf of Mexico in SE Louisiana, N of New Orleans. 41 miles (66 km) long; 25 miles (40 km) wide.
- pontificators — the office or term of office of a pontiff.
- poor relation — If you describe one thing as a poor relation of another, you mean that it is similar to or part of the other thing, but is considered to be inferior to it.
- poplar kitten — a moth, (Furcula bifida,) which has larvae like those of the related puss moth
- popular front — a coalition, usually temporary, of leftist and sometimes centrist political parties, formed against a common opponent, as fascism, and promoting social reform.
- porkpie (hat) — a man's soft hat with a round, flat crown
- pornification — the perceived pervasion of society in general or an aspect of it by the imagery, language, and attitudes associated with pornography
- port adelaide — the chief port of South Australia, near Adelaide on St Vincent Gulf. Pop: 33 145 (2006)
- port du salut — Port-Salut.
- port harcourt — a seaport in S Nigeria.
- port language — ["Communicating Parallel Processes", J. Kerridge et al, Soft Prac & Exp 16(1):63-86 (Jan 1986)].
- port of spain — (used with a plural verb) two islands in the N Atlantic Ocean, off the NE coast of Venezuela.
- port-of-spain — (used with a plural verb) two islands in the N Atlantic Ocean, off the NE coast of Venezuela.
- portal system — a vascular arrangement in which blood from the capillaries of one organ is transported to the capillaries of another organ by a connecting vein or veins.
- porte-monnaie — a purse or pocketbook
- portrait lens — a lens of moderately long focal length that is used, especially in portrait photography, to produce soft-focus images.
- portrait mode — an orientation that is vertical rather than horizontal
- posix threads — (programming) (Pthreads) A POSIX standard API that defines a set of C programming language types, functions and constants for creating and manipulating pre-emptive threads. The standard's full name is "POSIX.1c, Threads extensions (IEEE Std 1003.1c-1995)". Implementations are available on many Unix-like POSIX-conformant operating systems such as FreeBSD, NetBSD, OpenBSD, GNU/Linux, Mac OS X and Solaris as well as DR-DOS and Microsoft Windows. Pthreads was designed and implemented in the PART Project (POSIX / Ada-Runtime Project).
- post-cambrian — Geology. noting or pertaining to a period of the Paleozoic Era, occurring from 570 million to 500 million years ago, when algae and marine invertebrates were the predominant form of life.
- post-contract — an agreement between two or more parties for the doing or not doing of something specified.
- post-freudian — of or relating to Sigmund Freud or his doctrines, especially with respect to the causes and treatment of neurotic and psychopathic states, the interpretation of dreams, etc.
- post-graduate — of, pertaining to, characteristic of, or consisting of post-graduates: a postgraduate seminar.