17-letter words containing s, c, u, r, f, i
- the carboniferous — the Carboniferous period or rock system
- thiosulfuric acid — an acid, H 2 S 2 O 3 , that may be regarded as sulfuric acid with one oxygen atom replaced by sulfur.
- transfer function — The transfer function of a circuit is the ratio of the response to the input.
- unclassified road — a road that has not been given a grade because it is of a basic standard
- unofficial strike — a strike that is not approved by the strikers' trade union
- year of confusion — (in ancient Rome) the year of 445 days preceding the introduction, in 46 b.c., of the Julian calendar: lengthened to compensate for the cumulative errors of the Roman calendar.