21-letter words containing a, s, h, c, n, o

recompression chamber — hyperbaric chamber.
reconnaissance flight — a flight made by an aircraft in order to obtain military information about a particular place
rutherford scattering — the scattering of an alpha particle through a large angle with respect to the original direction of motion of the particle, caused by an atom (Rutherford atom) with most of the mass and all of the positive electric charge concentrated at a center or nucleus.
s-k reduction machine — An abstract machine defined by Professor David Turner to evaluate combinator expressions represented as binary graphs. Named after the two basic combinators, S and K.
saint anthony's cross — tau cross.
satisficing behaviour — the form of behaviour demonstrated by firms who seek satisfactory profits and satisfactory growth rather than maximum profits
schema definition set — (SDS) Something in Portable Common Tool Environment.
schlieren photography — a type of photography which records schlieren
school of hard knocks — the experience gained from living, especially from disappointment and hard work, regarded as a means of education: The only school he ever attended was the school of hard knocks.
second-hand endowment — A second-hand endowment is a traditional with-profits endowment policy that has been sold to a new owner part way through its term.
self-characterization — portrayal; description: the actor's characterization of a politician.
sheppard's correction — a method of correcting the bias in standard deviations and higher moments of distributions that arises from grouping values of the variable.
sick to one's stomach — afflicted with ill health or disease; ailing.
silicon tetrachloride — a colorless, fuming liquid, SiCl 4 , used chiefly for making smoke screens and various derivatives of silicon.
snr bandwidth product — (communications) The integral of the SNR over frequency. The SNR bandwidth product is an important limit in the capacity of a communication channel.
social anthropologist — an anthropologist who deals with cultural and social phenomena such as kinship systems or beliefs, esp of nonliterate peoples
somatotrophic-hormone — a hormone secreted by the anterior pituitary gland, that stimulates growth in humans.
south pacific current — an ocean current that flows E in the South Pacific Ocean parallel to the Antarctic Circumpolar Current.
spherical coordinates — 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.
stare one in the face — to be glaringly obvious or imminent
stations of the cross — a series of 14 crosses, often accompanied by 14 pictures or carvings, arranged in order around the walls of a church, to commemorate 14 supposed stages in Christ's journey to Calvary
stick in one's throat — to be difficult, or against one's conscience, for one to accept, utter, or believe
sunday school teacher — someone who teaches at a Sunday school
sympathetic vibration — a vibration induced by resonance.
synchrotron radiation — electromagnetic radiation emitted by charged particles as they pass through magnetic fields.
take the consequences — to accept the results of one's actions
tartarian honeysuckle — an Asian honeysuckle, Lonicera tatarica, having fragrant, white to pink flowers.
the (norman) conquest — the conquering of England by the Normans under William the Conqueror in 1066
the acting profession — actors considered as a group
the central provinces — the Canadian provinces of Ontario and Quebec
the comrades marathon — an annual long-distance race run every year on the 16th of June from Durban to Pietermaritzburg, a distance of approximately 90 kilometres (56 miles)
the corncracker state — a nickname for the state of Kentucky
the executive mansion — the White House
the press association — the national news agency for the United Kingdom and Ireland
the probation service — a criminal justice service that is mainly responsible for dealing with offenders by placing them under the supervision of a probation officer
the scout association — a worldwide movement for boys or (in some countries) girls, founded as the Boy Scouts in England in 1908 by Lord Baden-Powell with the aim of developing character and responsibility
the shipping forecast — a radio broadcast made by the BBC of weather reports and forecasts for the seas around the British Isles
the stationery office — (in the UK) the company that supplies the civil service with all its office supplies, machinery, printing and binding, etc
thermal decomposition — Thermal decomposition is the process in which a chemical species breaks down when its temperature is increased.
throw someone a curve — a continuously bending line, without angles.
to be hard luck on sb — to be unfortunate or unlucky for someone
to change the subject — When someone involved in a conversation changes the subject, they start talking about something else, often because the previous subject was embarrassing.
to sink without trace — If you say that someone or something sinks without trace or sinks without a trace, you mean that they stop existing or stop being successful very suddenly and completely.
union of south africa — former name for South Africa, Republic of.
vacation bible school — a religious school conducted by some churches during the summer for students on vacation.
what price something? — what are the chances of something happening now?
white-crowned sparrow — a North American sparrow, Zonotrichia leucophrys, having black and white stripes on the head.
wholesale price index — an indicator of price changes in the wholesale market
youth training scheme — (formerly, in Britain) a scheme, run by the Training Agency, to provide vocational training for unemployed 16–17-year-olds

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