13-letter words containing p, r, o, t, a
- triploblastic — having three primary germ layers, as the embryos of vertebrates.
- tripolitanian — of or relating to Tripolitania (now part of Libya) or its inhabitants
- troop carrier — a transport airplane used for carrying troops and their equipment.
- tropic-cancer — Geography. either of two corresponding parallels of latitude on the terrestrial globe, one (tropic of Cancer) about 23½° N, and the other (tropic of Capricorn) about 23½° S of the equator, being the boundaries of the Torrid Zone. the tropics, the regions lying between and near these parallels of latitude; the Torrid Zone and neighboring regions.
- tropical fish — any of numerous small, usually brightly colored fishes, indigenous to the tropics, and often kept and bred in home aquariums.
- tropical year — year (def 4b).
- tropical zone — Torrid Zone
- tropocollagen — the molecular unit which forms collagen, consisting of three polypeptide chains
- truman capote — Truman, 1924–84, U.S. novelist, short-story writer, and playwright.
- trust company — a company or corporation organized to exercise the functions of a trustee, but usually engaging also in other banking and financial activities.
- two-part time — duple time.
- typographical — of or relating to typography.
- ultrapowerful — extremely powerful
- ultratropical — outside the tropics.
- unappropriate — not appropriate or suitable
- 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.
- unexplanatory — serving to explain: an explanatory footnote.
- unicorn plant — a North American plant, Proboscidea (Martynia) louisianica, having creamy-white to red flowers blotched with purple, and a woody capsule with a long, curved beak.
- unproblematic — not problematic, not causing difficulties or confusion; uncomplicated
- unprotectable — to defend or guard from attack, invasion, loss, annoyance, insult, etc.; cover or shield from injury or danger.
- unprovocative — tending or serving to provoke; inciting, stimulating, irritating, or vexing.
- unsupportable — capable of being supported; endurable; maintainable.
- up to scratch — to break, mar, or mark the surface of by rubbing, scraping, or tearing with something sharp or rough: to scratch one's hand on a nail.
- upright piano — a piano with an upright rectangular body and with its strings running vertically. Compare spinet (def 1).
- uranite group — the mineralogical group including uranites and related minerals.
- vacation trip — a trip undertaken during a vacation
- vapor tension — vapor pressure.
- vapourer moth — a tussock moth, Orgyia antiqua, of hedgerows and trees, the female of which is wingless and lays her eggs on her former cocoon
- wafflestomper — a shoe with a thick sole resembling a waffle
- walter piston — Walter, 1894–1976, U.S. composer.
- waste product — material discarded as useless in the process of producing something.
- water opossum — yapok.
- water-proofed — impervious to water.
- 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.
- weatherperson — a meteorologist or weathercaster.
- weatherproofs — Third-person singular simple present indicative form of weatherproof.
- well-operated — to work, perform, or function, as a machine does: This engine does not operate properly.
- west paterson — a town in NE New Jersey.
- wolverhampton — a city in West Midlands, in W England.
- word painting — an effective verbal description.
- work stoppage — the collective stoppage of work by employees in a business or an industry to protest working conditions.
- working party — A working party is a committee which is formed to investigate a particular situation or problem and to produce a report containing its opinions and suggestions.
- 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.
- xiphiplastron — the fourth lateral plate of a turtle's plastron
- zinjanthropus — the genus to which Australopithecus boisei was formerly assigned.