18-letter words containing m, a, s, p, r
- pulmonic airstream — a current of lung air set in motion by the respiratory muscles in the production of speech.
- pyramus and thisbe — (in Greek legend) two lovers of Babylon: Pyramus, wrongly supposing Thisbe to be dead, killed himself and she, encountering him in his death throes, did the same
- radical empiricism — (in the philosophy of William James) the doctrine that the only proper subject matter of philosophy is that which can be defined in terms of experience, and that relations are a part of experience.
- raman spectroscopy — a form of spectroscopy which uses the Raman effect for studying molecules
- recess appointment — a person appointed to an office by the President of the United States without approval from the Senate because the Senate is in recess
- registered company — a company which has officially registered its business
- repayment schedule — a document detailing the specific terms of a borrower's loan, such as monthly payment, interest rate, due dates etc
- resaca de la palma — a locality in S Texas, near Brownsville: battle 1846.
- resistance plasmid — any of a group of bacterial plasmids carrying genetic information that provide resistance to antibiotic drugs: some resistance plasmids are able to transfer themselves, and hence resistance, during conjugation
- respiratory system — the system by which oxygen is taken into the body and an exchange of oxygen and carbon dioxide takes place; in mammals the system includes the nasal passages, pharynx, trachea, bronchi, and lungs.
- sampling frequency — sample rate
- seasonal promotion — Seasonal promotions are items marketed to customers at the appropriate time of year, such as coats in the winter and bathing suits in the summer.
- self-disparagement — the act of disparaging.
- september holidays — a period of time in September when people do not have to go to school, college or work
- september massacre — (in the French Revolution) the massacre of royalists and other inmates of the prisons of Paris, September 2–6, 1792.
- service department — a repair shop
- simple enumeration — a procedure for arriving at empirical generalizations by haphazard accumulation of positive instances.
- slow-motion replay — a showing again in slow motion of a sequence of action, esp of part of a sporting contest immediately after it happens
- small pastern bone — the part of the foot of a horse, cow, etc., between the fetlock and the hoof.
- soda-lime feldspar — plagioclase.
- sodium-vapour lamp — a type of electric lamp consisting of a glass tube containing neon and sodium vapour at low pressure through which an electric current is passed to give an orange light. They are used in street lighting
- something to spare — a surplus of something
- specimen signature — a signature to be compared to an original signature in order to verify someone's identity
- spectropolarimeter — an instrument for determining the extent to which plane-polarized light of various wavelengths is rotated by certain solutions, consisting of a combination of a spectroscope and a polarimeter.
- spherical geometry — the branch of geometry that deals with figures on spherical surfaces.
- spirits of ammonia — a 10% solution of ammonia in alcohol
- subatomic particle — physics:
- subsidiary company — a company whose controlling interest is owned by another company.
- summary proceeding — a mode of trial authorized by statute to be held before a judge without the usual full hearing.
- super giant slalom — a slalom race in which the course is longer and has more widely spaced gates than in a giant slalom.
- surveyor's compass — an instrument used by surveyors for measuring azimuths.
- sustaining program — a radio or television program without a commercial sponsor.
- swartkrans ape-man — the fossil remains of the extinct hominid Australopithecus robustus, found at Swartkrans, Republic of South Africa: formerly classified in the genus Paranthropus.
- sympathetic strike — sympathy strike.
- sympathetic string — a thin wire string, as in various obsolete musical instruments, designed to vibrate sympathetically with the bowed or plucked strings to reinforce the sound.
- symphony orchestra — a large orchestra composed of wind, string, and percussion instruments and organized to perform symphonic compositions.
- system-programming — a program, as an operating system, compiler, or utility program, that controls some aspect of the operation of a computer (opposed to application program).
- systems programmer — a person whose job is to program systems software
- temporal summation — the act or process of summing.
- temporary hardness — hardness of water due to the presence of magnesium and calcium hydrogencarbonates, which can be precipitated as carbonates by boiling
- the lords temporal — (in Britain) peers other than bishops in their capacity as members of the House of Lords
- to speak your mind — If you speak your mind, you say firmly and honestly what you think about a situation, even if this may offend or upset people.
- under-compensation — to compensate or pay less than is fair, customary, or expected.
- upper middle class — wealthy, highly-educated people
- withdrawal symptom — effects of stopping a drug
- women at point sur — a narrative poem (1927) by Robinson Jeffers.
- work-study program — a program enabling high-school or college students to combine academic work with actual job experience.
- world championship — an international competition in a particular sport or activity for people all around the world
- x-ray spectrometer — a spectrometer using x-rays to activate the inner electrons of an atom in order to separate and identify the chemical constituents of a substance and their concentrations.
- x-ray spectrometry — the use of an x-ray spectrometer.