16-letter words containing t, a, p, l
- transport police — the national police force for railways in Britain, which protects rail operators, staff and passengers
- trapezoidal rule — a numerical method for evaluating the area between a curve and an axis by approximating the area with the areas of trapezoids.
- trial separation — an experimental period of living apart
- triphenylmethane — a colorless, crystalline, solid compound containing three benzene rings, C 19 H 16 , from which many dyes are derived.
- triple-expansion — noting a power source, especially a steam engine, using the same fluid at three successive stages of expansion to do work in three or more cylinders.
- tropical cyclone — a cyclone that originates over a tropical ocean area and can develop into the destructive storm known in the U.S. as a hurricane, in the western Pacific region as a typhoon, and elsewhere by other names. Compare extratropical cyclone, hurricane (def 1), willy-willy.
- twelvepenny nail — a nail that is 3 1/4 inches (8.25 cm) long.
- two-tailed pasha — a distinctive vanessid butterfly of S Europe, Charaxes jasius, having mottled brown wings with a yellow-orange margin and frilled hind edges
- twofold purchase — a purchase using a double standing block and a double running block so as to give a mechanical advantage of four or five, neglecting friction, depending on whether the hauling is on the standing block or the running block.
- typhoid bacillus — the bacterium Salmonella typhosa, causing typhoid fever.
- ultracrepidarian — noting or pertaining to a person who criticizes, judges, or gives advice outside the area of his or her expertise: The play provides a classic, simplistic portrayal of an ultracrepidarian mother-in-law.
- ultramicroscopic — an instrument that uses scattering phenomena to detect the position of objects too small to be seen by an ordinary microscope.
- unapologetically — containing an apology or excuse for a fault, failure, insult, injury, etc.: An apologetic letter to his creditors explained the delay.
- undercapitalized — having insufficient capital for the efficient operation of a commercial enterprise
- underpitch vault — a construction having a central vault intersected by vaults of lower pitch.
- unissued capital — authorized capital that has not yet been issued as shares
- unparticularized — to make particular.
- unpredictability — not predictable; not to be foreseen or foretold: an unpredictable occurrence.
- unproportionally — having due proportion; corresponding.
- up with the lark — up early in the morning
- upper palatinate — See under Palatinate (def 1).
- upsilon particle — the 20th letter of the Greek alphabet (Υ, υ).
- vegetable sponge — loofah (def 2).
- ventriculography — radiography of the ventricles of the heart after injection of a contrast medium
- virtual particle — an elementary particle of transitory existence that does not appear as a free particle in a particular situation but that can transmit a force from one particle to another.
- voluntary helper — a person who aids or assists in a specified function of one's own accord and without compulsion or promise of remuneration
- walk a tightrope — be in a precarious position
- water lily tulip — a showy tulip, Tulipa kaufmanniana, of Turkestan, having spreading, white or pale-yellow flowers with yellow centers streaked with red.
- welfare payments — government benefits
- well-appreciated — to be grateful or thankful for: They appreciated his thoughtfulness.
- well-compensated — to recompense for something: They gave him ten dollars to compensate him for his trouble.
- whiptail wallaby — a wallaby of NE Australia, Macropus parryi, with a long slender tail
- willow ptarmigan — a ptarmigan, Lagopus lagopus, of arctic and subarctic regions of the New and Old Worlds, having brown, mottled plumage in summer and white plumage in winter.
- windfall profits — Windfall profits are excessive profits with a non-business cause such as a natural disaster.
- xenotransplanted — Transplanted by xenotransplantation.
- yah-boo politics — adversarial politics in which politicians constantly deride their opponents and dismiss everything suggested by them