18-letter words containing t, y, s, i

significant symbol — a verbal or nonverbal gesture, as a word or smile, that has acquired a conventionalized meaning.
silvery spleenwort — a fern, Diplazium pycnocarpon, of eastern North America, having fronds from 20 to 30 inches (50.8 to 76.2 cm) long on yellowish-green stalks.
six-finger country — an isolated area considered as being inhabited by people who practise inbreeding
skinny-rib sweater — a tight-fitting ribbed woollen jumper or pullover
sling psychrometer — a psychrometer so designed that the wet-bulb thermometer can be ventilated, to expedite evaporation, by whirling in the air.
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
society of friends — a Christian denomination, founded in England c. 1650 by George Fox, that has no formal creed, liturgy, or priesthood and rejects violence in human relations, esp. warfare
sodium hyposulfite — sodium thiosulfate.
sodium thiocyanate — a white powder or colorless, deliquescent crystals, NaSCN, used chiefly in organic synthesis and in medicine in the treatment of hypertension.
solitary sandpiper — a North American sandpiper, Tringa solitaria, of inland wetlands, having a brownish-gray, white-spotted back and whitish underparts.
solubility product — the maximum number of undissociated ions, of an electrolyte in a saturated solution, capable at a given temperature of remaining in equilibrium with the undissolved phase of the solution.
special relativity — the state or fact of being relative.
specific viscosity — a measure of the resistance to flow of a fluid, expressed as the ratio of the absolute viscosity of the fluid to that of a reference fluid (usually water in the case of liquids)
spectrocolorimetry — the quantitative measure of colors by spectrophotometry.
spectroheliography — the process of obtaining an image of the sun in light of a particular wavelength, such as calcium or hydrogen, showing the distribution of the element over the surface and in the solar atmosphere, using a spectroheliograph
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 geometry — the branch of geometry that deals with figures on spherical surfaces.
static electricity — a stationary electric charge built up on an insulating material.
stationary bicycle — an exercise bike
statutory sick pay — the pay an employee is legally entitled to when sick
stoichiometrically — of or relating to stoichiometry.
stokely carmichael — Hoagland Howard [hohg-luh nd] /ˈhoʊg lənd/ (Show IPA), ("Hoagy") 1899–1981, U.S. songwriter and musician.
strathclyde region — a former local government region in W Scotland: formed in 1975 from Glasgow, Renfrewshire, Lanarkshire, Buteshire, Dunbartonshire, and parts of Argyllshire, Ayrshire, and Stirlingshire; replaced in 1996 by the council areas of Glasgow, Renfrewshire, East Renfrewshire, Inverclyde, North Lanarkshire, South Lanarkshire, Argyll and Bute, East Dunbartonshire, West Dunbartonshire, North Ayrshire, South Ayrshire, and East Ayrshire
street credibility — street cred.
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.
supportive therapy — any treatment, such as the intravenous administration of certain fluids, designed to reinforce or sustain the physiological well-being of a patient
swedish gymnastics — a system of passive and active exercising of muscles and joints
symbolist movement — a movement beginning in French and Belgian poetry towards the end of the 19th century with the verse of Mallarmé, Valéry, Verlaine, Rimbaud, Maeterlinck, and others, and seeking to express states of mind rather than objective reality by making use of the power of words and images to suggest as well as denote
symmetric function — a polynomial in several indeterminates that stays the same under any permutation of the indeterminates.
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.
synthetic division — a simplified procedure for dividing a polynomial by a linear polynomial.
synthetic geometry — elementary geometry, as distinct from analytic geometry.
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.
take sth literally — If you take something literally, you think that a word or expression is being used with its most simple or basic meaning.
tardive dyskinesia — a disorder characterized by restlessness and involuntary rolling of the tongue or twitching of the face, trunk, or limbs, usually occurring as a complication of long-term therapy with antipsychotic drugs.
television company — a company that broadcasts programmes by television
tertiary structure — the way in which the helixes or beta structures of a polypeptide are folded or arranged into a three-dimensional configuration.
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 hotel industry — the branch of the services industry which provides hotels
the movie industry — the industry that makes entertainment films or movies
thirty-second note — a note having 1/32 of the time value of a whole note; demi-semiquaver.
thirty-second rest — a rest equal in value to a thirty-second note.
to close your mind — If you close your mind to something, you deliberately do not think about it or pay attention to it.
to cross your mind — If you say that an idea or possibility never crossed your mind, you mean that you did not think of it.
to gird your loins — If you gird your loins, you prepare to do something difficult or dangerous.
to play favourites — to display favouritism
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.

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