12-letter words containing p, r, o, t, a
- tricephalous — with three heads
- trichopteran — trichopterous.
- tricorporate — having three bodies
- tripartition — division into three parts.
- triphosphate — a salt derived from triphosphoric acid.
- tripolitania — Also, Tripolitania [trip-uh-li-tey-nee-uh, -teyn-yuh; Italian tree-paw-lee-tah-nyah] /ˌtrɪp ə lɪˈteɪ ni ə, -ˈteɪn yə; Italian ˌtri pɔ liˈtɑ nyɑ/ (Show IPA). one of the former Barbary States of N Africa: later a province of Turkey; now a part of Libya.
- tripudiation — the act of dancing for joy
- trojan group — a group of asteroids oscillating about either of two points, equidistant from the sun and Jupiter, that forms an equilateral triangle with the sun and Jupiter.
- trophallaxis — (among social insects) the exchange of nutriments or other secretions between members of a colony.
- trophotactic — of or relating to trophotaxis
- tropicalised — to make tropical, as in character or appearance.
- tropicalized — to make tropical, as in character or appearance.
- troposcatter — the scattering or extended propagation of radio signals using the local irregularities in the Earth's troposphere
- trypanocidal — (of a drug, agent, activity, etc) effective in killing trypanosomes
- turbo pascal — (language, product) Borland International's Pascal. Perhaps the first integrated development environment for MS-DOS. Versions 1.0-3.0: standard Pascal with a few extensions Versions 4.0 (1987) and 5.0: separate compilation. Version 5.5: object-oriented. Version 6.0: Turbo Vision OOP library.
- twin paradox — a phenomenon predicted by relativity. One of a pair of identical twins is supposed to live normally in an inertial system whilst the other is accelerated to a high speed in a spaceship, travels for a long time, and finally returns to rest beside his twin. The travelled twin will be found to be younger than his brother
- typhoid mary — Mary ("Typhoid Mary") 1869?–1938, U.S. cook, born in Ireland: known immune carrier of typhoid fever who infected many with the disease, institutionalized in 1914.
- typographist — a person skilled in the art of typography
- ultracompact — extremely compact, esp of technology that is much smaller than a standard model
- unimportance — a lack of importance
- unpatronized — having few or no patrons
- unperforated — pierced with a hole or holes: Punch out along the perforated line.
- unprofitable — being without profit; not showing or turning a profit: a series of unprofitable ventures.
- unreportable — not able to be reported, relayed, or spoken of
- van der post — Sir Laurens (Jan). 1906–96, South African writer and traveller. His works include the travel books Venture to the Interior (1952), The Lost World of the Kalahari (1958), and Testament to the Bushmen (1984) and the novels The Hunter and the Whale (1967) and The Admiral's Baby (1996)
- vaporization — the act of vaporizing.
- vapour trail — A vapour trail is a white line of water vapour left in the sky by an aeroplane, a rocket, or a missile.
- vector space — an additive group in which addition is commutative and with which is associated a field of scalars, as the field of real numbers, such that the product of a scalar and an element of the group or a vector is defined, the product of two scalars times a vector is associative, one times a vector is the vector, and two distributive laws hold.
- velociraptor — a small carnivorous dinosaur of the genus Velociraptor , from the late Cretaceous period, capable of leaping, and growing to a length of about 6 feet (2 meters), having feathers, a flat snout, short forelimbs with large handlike talons, and a large sickle-shaped claw on each foot.
- vituperation — verbal abuse or castigation; violent denunciation or condemnation.
- vituperatory — abusive or blaming
- voting paper — a ballot.
- walk-on part — acting role with no spoken lines
- water pistol — a toy gun that shoots a stream of liquid.
- water pocket — a cavity at the foot of a cliff formed by the falling action of an intermittent stream.
- water sports — a sport played or practiced on or in water, as swimming, water polo, or surfing.
- water sprout — a nonflowering shoot arising from a branch or axil of a tree or shrub.
- water vapour — steam
- watering pot — a container for water, typically of metal or plastic and having a spout with a perforated nozzle, for watering or sprinkling plants, flowers, etc.
- waterproofed — Having been made waterproof.
- waterproofer — One who, or that which, makes waterproof.
- weatherproof — able to withstand exposure to all kinds of weather.
- whaling port — a home port for whaling vessels.
- white poplar — Also called abele. an Old World poplar, Populus alba, widely cultivated in the U.S., having the underside of the leaves covered with a dense silvery-white down.
- wild apricot — apricot (def 4).
- williamsport — a city in central Pennsylvania, on the Susquehanna River.
- wool stapler — a dealer in wool.
- worlds apart — in different environments
- wrap account — a personally managed investment account where charges are levied on the basis of the account's total assets.
- xanthopterin — a yellow pigment, C6H5N5O2, found in some butterfly or moth wings or in the urine of mammals