21-letter words containing c, e, m, t, r, y
- rocky mountain oyster — mountain oyster.
- scarlet monkey flower — any of various plants belonging to the genus Mimulus, of the figwort family, as M. cardinalis (scarlet monkey flower) having spotted flowers that resemble a face.
- secondary containment — Secondary containment is a system for dealing with hazardous spills.
- sedimentary sequences — Sedimentary sequences are layers of rock which are derived from weathered rocks, biogenic (= of living organisms) activity, or precipitation from solution.
- skew symmetric matrix — a matrix that is equal to the negation of its transpose
- sympathetic vibration — a vibration induced by resonance.
- the maastricht treaty — a treaty on European economic and monetary union agreed by government leaders of the 12 EC states at a meeting in Maastricht in December 1991
- therapeutic community — a group-based form of therapy for mental disorders, sometimes residential
- volumetric efficiency — the ratio of fluid delivered by a piston or ram pump per stroke to the displacement volume of the piston or ram
- water-vascular system — a system of closed, fluid-filled tubes and ducts of echinoderms used in clinging, locomotion, feeding, and respiration.
- youth training scheme — (formerly, in Britain) a scheme, run by the Training Agency, to provide vocational training for unemployed 16–17-year-olds