20-letter words containing c, h, t, o
- prohibited substance — a substance, such as a drug, etc, that is banned or forbidden by law or other authority
- propylphenyl acetate — phenylpropyl acetate.
- prosthetic dentistry — prosthodontics.
- pseudoparenchymatous — (in certain fungi and red algae) a compact mass of tissue, made up of interwoven hyphae or filaments, that superficially resembles plant tissue.
- psychiatric hospital — institution treating mental disorders
- psychological moment — the proper or critical time for achieving a desired result: She found the right psychological moment to make her request.
- psychometric testing — the use of psychometric tests, often as a selection method
- psychomotor epilepsy — temporal-lobe epilepsy.
- punch a (time) clock — to insert a timecard into a time clock when coming to or going from work
- quantum cryptography — a method of coding information based on quantum mechanics, which is said to be unbreakable
- quarantine anchorage — an anchorage for ships awaiting a pratique.
- quick on the trigger — quick to fire a gun
- read the riot act to — to command to stop doing something regarded as wrong, under threat of punishment
- recreational therapy — therapy by means of recreational activities engaged in by the patient
- recreational vehicle — a van or utility vehicle used for recreational purposes, as camping, and often equipped with living facilities. Abbreviation: RV.
- rise to the occasion — to have the courage, wit, etc, to meet the special demands of a situation
- rocky mountain sheep — bighorn.
- saint john ambulance — an organization that provides first aid and first-aid training
- satellite chromosome — a type of densely staining chromosome of uncertain biological function, found in many plant and animal species.
- scatter site housing — public housing, especially for low-income families, built throughout an urban area rather than being concentrated in a single neighborhood.
- scheme object system — (SOS) Chris Hanson?
- schizoid personality — sb with identity disorder
- school without walls — a nontraditional educational program that uses community facilities as learning resources.
- schrodinger equation — the wave equation of nonrelativistic quantum mechanics. Also called Schrödinger wave equation. Compare wave equation (def 2).
- scottish nationalism — a political ideology advocating the independence of Scotland
- season ticket holder — a person who has a season ticket
- semiautobiographical — pertaining to or being a fictionalized account of an author's own life.
- settle accounts with — to pay or receive a balance due
- sex change operation — a surgical operation designed to change a person's physical sexual characteristics to those of the opposite sex
- shifting cultivation — a land-use system, esp in tropical Africa, in which a tract of land is cultivated until its fertility diminishes, when it is abandoned until this is restored naturally
- short back and sides — If a man has a short back and sides, his hair is cut very short at the back and sides with slightly thicker, longer hair on the top of the head.
- silicon tetrahydride — silane (def 1).
- skating championship — a competition for ice-skating
- south american plate — a major tectonic division of the earth's crust, comprising the continent of South America and several ocean basins and bounded on the north by the Caribbean Plate, on the east by the Mid-Atlantic Ridge, on the west by a submarine trench that borders the western coast of the continent, and on the south by the Antarctic Plate.
- south atlantic ocean — the part of the Atlantic Ocean extending S from the Equator to the Antarctic continent.
- southern oscillation — a low-latitude fluctuation of atmospheric pressure closely linked with El Niño events, specifically the periods of El Niño warming and La Niña cooling.
- spatial technologies — (company) Distributors of the ACIS solid modelling engine.
- special relationship — the exceptionally close political, diplomatic, cultural and historical relations between the United States and the United Kingdom
- spectrophotoelectric — pertaining to the relationship between the wavelength of the incident radiation and the number of electrons released by a photoelectric substance.
- spherical aberration — variation in focal length of a lens or mirror from center to edge, due to its spherical shape.
- spherical coordinate — Usually, spherical coordinates. any of three coordinates used to locate a point in space by the length of its radius vector and the angles this vector makes with two perpendicular polar planes.
- st. george's channel — a channel between Wales and Ireland, connecting the Irish Sea and the Atlantic. 100 miles (160 km) long; 50–90 miles (81–145 km) wide.
- states of the church — Papal States
- step into the breach — If you step into the breach, you do a job or task which someone else was supposed to do or has done in the past, because they are suddenly unable to do it.
- stochastic terrorism — the public demonization of a person or group resulting in the incitement of a violent act, which is statistically probable but whose specifics cannot be predicted: The lone-wolf attack was apparently influenced by the rhetoric of stochastic terrorism.
- stockholders' equity — the net assets of a corporation as owned by stockholders in capital stock, capital surplus, and undistributed earnings.
- stoichiometric ratio — The stoichiometric ratio is the exact ratio between air and flammable gas or vapor at which complete combustion takes place.
- straight-cut tobacco — tobacco that is cut in such a way that it will lie flat.
- switchboard operator — a person who operates an installation in a telephone exchange, office, hotel, etc, at which the interconnection of telephone lines is manually controlled
- synchronized skating — the art or sport of teams of up to twenty skaters holding onto each other and moving in patterns in time to music