17-letter words containing f, a, l, s, i, t
- thermal diffusion — the separation of constituents, often isotopes, of a fluid under the influence of a temperature gradient.
- thiosulfuric acid — an acid, H 2 S 2 O 3 , that may be regarded as sulfuric acid with one oxygen atom replaced by sulfur.
- unofficial strike — a strike that is not approved by the strikers' trade union
- veiltail goldfish — an artificially bred, indoor variety of goldfish, usually golden or calico and of a spheroid shape, having a fully divided, drooping tail fin exceeding the body in length.
- ventilation shaft — a shaft in a mine, tunnel, or building used for providing ventilation or fresh air
- wallis and futuna — French overseas territory in the South Pacific, northeast of the Fiji Islands: it consists of two groups of islands (Wallis Islands and Futuna Islands): c. 106 sq mi (275 sq km); pop. 14,000