15-letter words containing r, a, t, h, o, l
- thiocarbanilide — a gray powder, C 13 H 12 N 2 S, used as an intermediate in dyes and as an accelerator in vulcanization.
- thorndike's law — the principle that all learnt behaviour is regulated by rewards and punishments, proposed by Edward Lee Thorndike (1874–1949), US psychologist
- thyrocalcitonin — calcitonin
- to grab hold of — Hold is used in expressions such as grab hold of, catch hold of, and get hold of, to indicate that you close your hand tightly around something, for example to stop something moving or falling.
- training school — a school that provides training in some art, profession, or vocation.
- transhistorical — occurring throughout all human history
- travel brochure — a brochure, often from a travel agency, which advertises holidays, hotels, etc
- tribromoethanol — a white, crystalline powder, C 2 H 3 Br 3 O, used as a basal anesthetic.
- trichloroacetic — as in trichloroacetic acid
- trichloroethane — a volatile nonflammable colourless liquid with low toxicity used for cleaning electrical apparatus and as a solvent; 1,2,3-trichloroethane. Formula: CH3CCl3
- trichomonacidal — relating to a trichomonacide
- trochlear nerve — either one of the fourth pair of cranial nerves, consisting of motor fibers that innervate the superior oblique muscle of the upper part of the eyeball.
- typographically — of or relating to typography.
- ultramarathoner — a person who takes part in an ultramarathon
- ultramicrofiche — ultrafiche.
- ultrasonography — a diagnostic imaging technique utilizing reflected high-frequency sound waves to delineate, measure, or examine internal body structures or organs.
- uncopyrightable — not able to be copyrighted
- weather balloon — sounding balloon.
- wentworth scale — a scale for specifying the sizes (diameters) of sedimentary particles, ranging from clay particles (less than 1⁄256 mm) to boulders (over 256 mm)
- west hartlepool — a former borough, now part of Hartlepool, in Cleveland County, in NE England, at the mouth of the Tees.
- winter holidays — a period of rest from work or studies taken in winter
- wreathed column — a column having a twisted or spiral form.
- xylotypographic — involving or pertaining to xylotypography