18-letter words containing e, p, n, t

specimen signature — a signature to be compared to an original signature in order to verify someone's identity
speech recognition — Computers. the computerized analysis of spoken words in order to identify the speaker, as in security systems, or to respond to voiced commands: the analysis is performed by finding patterns in the spectrum of the incoming sound and comparing them with stored patterns of elements of sound, as phones, or of complete words.
speech synthesizer — device that imitates human voice
sperry corporation — (company) The company which merged with the Burroughs Corporation to form Unisys Corporation. Divisions included Sperry Univac, Sperry Flight Systems, and others. Some of these were sold off after the merger.
spherical triangle — a triangle formed by arcs of great circles of a sphere.
spinal anaesthesia — anaesthesia of the lower half of the body produced by injecting an anaesthetic beneath the arachnoid membrane surrounding the spinal cord
spur-of-the-moment — occurring or done without advance preparation or deliberation; extemporaneous; unplanned: a spur-of-the-moment decision.
stand-by passenger — someone who buys a (usually cheaper) ticket, if they are still available, on a plane just before it is about to leave rather than booking in advance
stepping-off place — jumping-off place (def 2).
stroustrup, bjarne — Bjarne Stroustrup
subject complement — a word or a group of words, usually functioning as an adjective or noun, that is used in the predicate following a copula and describes or is identified with the subject of the sentence, as sleepy in The travelers became sleepy.
super giant slalom — a slalom race in which the course is longer and has more widely spaced gates than in a giant slalom.
superstring theory — any supersymmetric string theory in which each type of elementary particle is treated as a vibration of a single fundamental string (superstring) at a particular frequency.
supporting actress — an actress playing a supporting role
suspended sentence — law: deferred decision
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.
sweptwing aircraft — an aircraft which has wings that are swept (usually) backwards
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).
systematic phoneme — a phonological unit in generative phonology representing an underlying form that takes into account the relationship between phonological patterns and morphological variation, as the unit underlying the second vowel in both derive and derivative.
talent competition — a contest in which people compete by showcasing their talents, for example in singing, dancing, acrobatics, etc
talk between ships — TBS (def 1).
teaching equipment — teaching aids
telephone exchange — a telecommunications facility to which subscribers' telephones connect, that switches calls among subscribers or to other exchanges for further routing.
telephone receiver — a device, as in a telephone, that converts changes in an electric current into sound.
telephone sex line — a telephone line operated by a phone-sex worker that offers phone sex to paying customers
television company — a company that broadcasts programmes by television
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
terrestrial planet — inner planet.
the encyclopedists — the writers of the French Encyclopedia (1751-72) edited by Diderot and d'Alembert, which contained the advanced ideas of the period
the general public — the people in a society; people in general
the heavens opened — it started pouring with rain
the passenger seat — the seat used by a passenger of a car, beside the driver
thought experiment — Physics. a demonstration or calculation that is based on the postulates of a theory, as relativity, and that demonstrates or clarifies the consequences of the postulates.
threatened species — a species likely, in the near future, to become an endangered species within all or much of its range.
to all appearances — apparently
to be tickled pink — If you are tickled pink, you are extremely pleased about something.
to cast aspersions — If you cast aspersions on someone or something, you suggest that they are not very good in some way.
to fall into place — If things fall into place, events happen naturally to produce a situation you want.
to learn the ropes — If you are learning the ropes, you are learning how a particular task or job is done.
to lick into shape — If you lick, knock, or whip someone or something into shape, you use whatever methods are necessary to change or improve them so that they are in the condition that you want them to be in.
to open your heart — If you open your heart or pour out your heart to someone, you tell them your most private thoughts and feelings.
to pick and choose — If you pick and choose, you carefully choose only things that you really want and reject the others.
to pull a fast one — If you say that someone has pulled a fast one on you, you mean that they have cheated or tricked you.
to put years on sb — if you say that something such as an experience or a way of dressing has put years on someone, you mean that it has made them look or feel much older
to scrape a living — If you say that someone scrapes a living or scratches a living, you mean that they manage to earn enough to live on, but it is very difficult. In American English, you say they scrape out a living or scratch out a living.
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.
to spill the beans — If you spill the beans, you tell someone something that people have been trying to keep secret.

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