21-letter words containing m, o, r, t, i, c
- monochloroacetic acid — chloroacetic acid.
- motion-picture camera — a sequence of consecutive pictures of objects photographed in motion by a specially designed camera (motion-picture camera) and thrown on a screen by a projector (motion-picture projector) in such rapid succession as to give the illusion of natural movement.
- motivational research — the application of the knowledge and techniques of the social sciences, especially psychology and sociology, to understanding consumer attitudes and behavior: used as a guide in advertising and marketing.
- multi-ringed compound — A multi-ringed compound is a compound which has 70 or more carbon atoms, often a residual compound.
- multilayer perceptron — A network composed of more than one layer of neurons, with some or all of the outputs of each layer connected to one or more of the inputs of another layer. The first layer is called the input layer, the last one is the output layer, and in between there may be one or more hidden layers.
- multiplication factor — the ratio of the number of neutrons in a generation to the number of neutrons in the previous generation: when the multiplication factor is equal to or greater than one, a chain reaction is possible
- municipal corporation — a city, town, village, etc., that operates under a corporate charter granted by the state.
- myocardial infarction — heart attack. Abbreviation: MI.
- network time protocol — (NTP) A protocol built on top of TCP/IP that assures accurate local timekeeping with reference to radio, atomic or other clocks located on the Internet. This protocol is capable of synchronizing distributed clocks within milliseconds over long time periods. It is defined in STD 12, RFC 1119.
- night-blooming cereus — any of various cacti of the genera Hylocereus, Peniocereus, Nyctocereus, or Selenicereus, having large, usually white flowers that open at night.
- non-repeating decimal — a decimal representation of any irrational number, having the property that no sequence of digits is repeated ad infinitum.
- nonexamination course — a course of study in which there are no examinations
- olympic national park — a national park in NW Washington. 1323 sq. mi. (3425 sq. km).
- operational semantics — (theory) A set of rules specifying how the state of an actual or hypothetical computer changes while executing a program. The overall state is typically divided into a number of components, e.g. stack, heap, registers etc. Each rule specifies certain preconditions on the contents of some components and their new contents after the application of the rule. It is similar in spirit to the notion of a Turing machine, in which actions are precisely described in a mathematical way. Compuare axiomatic semantics, denotational semantics.
- partial reinforcement — the process of randomly rewarding an organism for making a response on only some of the occasions it makes it
- percussion instrument — a musical instrument, as the drum, cymbal, triangle, xylophone, or piano, that is struck to produce a sound, as distinguished from string or wind instruments.
- performance indicator — a quantitative or qualitative measurement, or any other criterion, by which the performance, efficiency, achievement, etc of a person or organization can be assessed, often by comparison with an agreed standard or target
- persistence of memory — a painting (1931) by Salvador Dali.
- piezoelectric ceramic — any ceramic that exhibits piezoelectric properties.
- pomp and circumstance — ceremony
- potassium bicarbonate — a white, crystalline, slightly alkaline, salty-tasting, water-soluble powder, KHCO 3 , produced by the passage of carbon dioxide through an aqueous potassium carbonate solution: used in cookery as a leavening agent and in medicine as an antacid.
- premature ejaculation — a male psychosexual disorder in which ejaculation occurs soon after the commencement of sexual intercourse.
- price competitiveness — pricing goods or services so that they are competitive with the prices of other companies
- primitive dicotyledon — any living relative of early angiosperms that branched off before the evolution of monocotyledons and eudicotyledons. The group comprises about 5 per cent of the world's plants
- production department — the department of a business or organization responsible for manufacturing products
- profit-sharing scheme — a scheme employing profit-sharing; a system in which a portion of the net profit of a business is distributed to its employees, usually in proportion to their wages or their length of service
- psychomotor agitation — agitation (def 3).
- psychomotor-agitation — the act or process of agitating; state of being agitated: She left in great agitation.
- public administration — the implementation of public policy, largely by the executive branch.
- pulmonary circulation — the circulation of blood from the heart to the lungs for oxygenation and back to the heart.
- queer someone's pitch — to upset someone's plans
- racial discrimination — prejudice based on race
- record of achievement — a statement of the personal and educational development of each pupil
- registration document — a document giving identification details of a motor vehicle, including its manufacturer, date of registration, engine and chassis numbers, and owner's name
- reinforcement therapy — a behavior modification technique in which appropriate behavior is strengthened through systematic reinforcement.
- remote write protocol — (chat, protocol) (RWP) A proposed Internet protocol for exchanging short messages between terminals. The RWP proposal is detailed in RFC 1756.
- replacement algorithm — The method used to determine which entry in an associative cache to flush to main memory when it is desired to cache a new block of data. The "least recently used" algorithm flushed the block which has not been accessed for the longest time. A random replacement algorithm picks any block with equal probability.
- resident commissioner — a representative from a dependency, as Guam or Puerto Rico, who is entitled to speak, but not to vote, in the U.S. House of Representatives.
- return the compliment — repay sb's kindness with a kind act
- reverberation chamber — a room with walls that reflect sound. It is used to make acoustic measurements and as a source of reverberant sound to be mixed with direct sound for recording or broadcasting
- rocky mountain locust — a migratory locust, Melanoplus spretus, that occurs in North America, especially the Great Plains, where swarms cause great damage to crops and other vegetation.
- rocky mountain oyster — mountain oyster.
- roman catholic church — the Christian church of which the pope, or bishop of Rome, is the supreme head.
- 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.
- sao tome and principe — Democratic Republic of, a republic in W Africa, comprising the islands of São Tomé and Príncipe, in the Gulf of Guinea, N of the equator: a former overseas province of Portugal; gained independence in 1975. 372 sq. mi. (964 sq. km). Capital: São Tomé.
- saponification number — the number of milligrams of potassium hydroxide required to saponify one gram of a given ester, especially a glyceride.
- scalar multiplication — an operation used in the definition of a vector space in which the product of a scalar and a vector is a vector, the operation is distributive over the addition of both scalars and vectors, and is associative with multiplication of scalars
- secondary containment — Secondary containment is a system for dealing with hazardous spills.
- secure hash algorithm —
- short message service — (messaging) (SMS) A message service offered by the GSM digital mobile telephone system. Using SMS, a short alphanumeric message (160 alphanumeric characters) can be sent to a mobile phone to be displayed there, much like in an alphanumeric pager system. The message is buffered by the GSM network until the phone becomes active.