13-letter words containing s, p, o, i
- trainspotting — hobby: observing trains
- transcription — the act or process of transcribing.
- transcriptome — a collection of all the messenger RNA in a particular cell
- transpiration — an action or instance of transpiring.
- transposition — an act of transposing.
- treponemiasis — infection with treponema; syphilis.
- trichopterist — a student of, or expert in, trichopteran insects
- trichopterous — belonging or pertaining to the insect order Trichoptera, comprising the caddisflies.
- triploblastic — having three primary germ layers, as the embryos of vertebrates.
- trophotropism — the response by an organism or cell to, or the movement of an organism or cell towards or away from, an external source of nutrition
- tropical fish — any of numerous small, usually brightly colored fishes, indigenous to the tropics, and often kept and bred in home aquariums.
- turkish pound — the Turkish lira.
- uncomplaisant — not eager to please; not compliant or obliging
- 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.
- unimpassioned — not filled with passion or affected by strong emotion
- 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.
- unpretentious — not pretentious; modest; without ostentatious display; plain: his unpretentious demeanor; an unpretentious summer resort.
- 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.
- unpromisingly — in a manner that is not showing any promise of favourable development or future success
- unprovisioned — a clause in a legal instrument, a law, etc., providing for a particular matter; stipulation; proviso.
- 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.
- uprighteously — in an upright or moral manner
- vapor tension — vapor pressure.
- vapourishness — the quality or state of being vapourish
- vino de pasto — a pale, dry sherry of Spain.
- violin spider — brown recluse spider.
- visceroptosis — a downward displacement of the intestine
- visual foxpro — (database) A Microsoft database derived from Fox Software's FoxPRO.
- 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
- 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 disposed — If you are well disposed to a person, plan, or activity, you are likely to agree with them or support them.
- well-disposed — favorably, sympathetically, or kindly disposed: The sponsors are well-disposed toward our plan.
- well-polished — made smooth and glossy: a figurine of polished mahogany.
- whip scorpion — any of numerous arachnids of the order Uropygi, of tropical and warm temperate regions, resembling a scorpion but having an abdomen that ends in a slender, nonvenomous whip.
- whipping post — a post to which persons are tied to undergo whipping as a legal penalty.
- whippoorwills — Plural form of whippoorwill.
- wind scorpion — sun spider.
- 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.
- xiphiplastron — the fourth lateral plate of a turtle's plastron
- xiphophyllous — (botany) Having sword-shaped leaves.
- zf expression — (programming) (After Zermelo Fränkel set theory). David Turner's name for list comprehension.
- zinjanthropus — the genus to which Australopithecus boisei was formerly assigned.
- zoophysiology — the physiology of animals as opposed to humans
- 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.
- zoosporangium — a sporangium or spore case in which zoospores are produced.