21-letter words containing m, i, r, y, a, c
- rocky mountain oyster — mountain oyster.
- 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
- summary court-martial — a court-martial composed of one commissioned officer, authorized to try minor offenses against military law.
- 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
- youth training scheme — (formerly, in Britain) a scheme, run by the Training Agency, to provide vocational training for unemployed 16–17-year-olds