13-letter words containing p, e, r, i, o
- tropical year — year (def 4b).
- tropical zone — Torrid Zone
- truchet point — (unit, text) An obsolete variant of the point, equal to 0.188 mm.
- two-part time — duple time.
- type ii error — the error made in the statistical testing of a hypothesis by accepting the null hypothesis when it is actually false.
- typhoid fever — Also called typhoid fever. an infectious, often fatal, febrile disease, usually of the summer months, characterized by intestinal inflammation and ulceration, caused by the typhoid bacillus, which is usually introduced with food or drink.
- unappropriate — not appropriate or suitable
- uncompromised — unable to function optimally, especially with regard to immune response, owing to underlying disease, harmful environmental exposure, or the side effects of a course of treatment.
- uncooperating — to work or act together or jointly for a common purpose or benefit.
- uncooperative — working or acting together willingly for a common purpose or benefit.
- under pain of — physical suffering or distress, as due to injury, illness, etc.
- underoccupied — not having enough to do or to engage one's attention
- unpersonified — to attribute human nature or character to (an inanimate object or an abstraction), as in speech or writing.
- unperspicuous — clearly expressed or presented; lucid.
- unpolarizable — not capable of being polarized
- unpreoccupied — not preoccupied
- unpretentious — not pretentious; modest; without ostentatious display; plain: his unpretentious demeanor; an unpretentious summer resort.
- unproblematic — not problematic, not causing difficulties or confusion; uncomplicated
- unprogressive — favoring or advocating progress, change, improvement, or reform, as opposed to wishing to maintain things as they are, especially in political matters: a progressive mayor.
- unprovisioned — a clause in a legal instrument, a law, etc., providing for a particular matter; stipulation; proviso.
- unprovocative — tending or serving to provoke; inciting, stimulating, irritating, or vexing.
- unreproaching — not reproaching or blaming
- unresponsible — answerable or accountable, as for something within one's power, control, or management (often followed by to or for): He is responsible to the president for his decisions.
- upper chinook — a Chinookan language of the Columbia River valley from the Deschutes River to the estuary.
- uprighteously — in an upright or moral manner
- uranite group — the mineralogical group including uranites and related minerals.
- vapor barrier — a layer of material, as plastic film or foil, used to protect installed insulation by retarding the transmission of moisture from the interior environment.
- vapor tension — vapor pressure.
- vapourishness — the quality or state of being vapourish
- vinyl polymer — any of a group of compounds derived by polymerization from vinyl compounds, as vinyl acetate and styrene.
- violin spider — brown recluse spider.
- visceroptosis — a downward displacement of the intestine
- voice over ip — (communications) (VoIP) Any technology providing voice telephony services over IP, including CODECs, streaming protocols and session control. The major advantage of VoIP is lower cost, by avoiding dedicated voice circuits. Currently VoIP is being deployed on internal corporate networks, and, via the Internet, for low cost (and low quality) international calls. It is also used for telephony applications such as voice and fax mail. The ITU standard is H.323, which is a whole suite of protocols, while the IETF has developed the much simpler SIP to solve the session control problem and MGCP/Megaco to solve the gateway problem.
- volute spring — a coil spring, conical in shape, extending in the direction of the axis of the coil.
- walter piston — Walter, 1894–1976, U.S. composer.
- watering spot — watering hole
- waterproofing — Chiefly British. a raincoat or other outer coat impervious to water.
- waterscorpion — any of several predaceous aquatic bugs of the family Nepidae, having clasping front legs and a long respiratory tube at the rear of the abdomen: capable of biting if handled.
- well-provided — having been furnished or supplied with a sufficient amount
- will to power — (in the philosophy of Nietzsche) the self-assertive creative drive in all individuals, regarded as the supreme quality of the superman.
- winter sports — Winter sports are sports that take place on ice or snow, for example skating and skiing.
- worker-priest — (in France) a Roman Catholic priest who, in addition to his priestly duties, works part-time in a secular job.
- workingperson — a workingman or workingwoman.
- write-protect — to protect (a recordable disk) from accidental erasure or change; to mark (a file or disk) so that its contents cannot be modified or deleted.
- xerophthalmia — abnormal dryness of the eyeball characterized by conjunctivitis, caused by a deficiency of tears and attributed to a lack of vitamin A.
- xerophthalmic — Of or pertaining to xerophthalmia.
- york imperial — an American variety of yellow or green apple with red stripes.
- zf expression — (programming) (After Zermelo Fränkel set theory). David Turner's name for list comprehension.
- zoogeographic — Pertaining to zoogeography.
- zoopraxiscope — an early type of motion-picture projector, designed by Eadweard Muybridge, in which the images were drawings or photographs placed along the rim of a circular glass plate, the shutter was a rotating opaque disk with radial slots, and a limelight source was used.