15-letter words starting with si
- siberian squill — a bulbous, Eurasian plant, Scilla siberica, of the lily family, having nodding, deep blue flowers.
- sibling rivalry — the feeling of competitiveness that often exists between brothers and sisters
- sibling species — one of two or more species that closely resemble one another but whose members cannot interbreed successfully.
- sibylline books — (in ancient Rome) a collection of prophetic sayings, supposedly bought from the Cumaean sibyl, bearing upon Roman policy and religion
- side impact bar — A side impact bar is a long beam in a car door that is designed to protect passengers during a crash.
- sidereal period — the period of revolution of a body about another with respect to one or more distant stars
- sidesplittingly — in a side-splitting manner
- sidewalk artist — an artist who draws pictures on the sidewalk, especially with colored chalk, as a means of soliciting money from passers-by.
- siege mentality — a state of mind whereby one believes that one is being constantly attacked, oppressed, or isolated.
- sigmoid flexure — Zoology. an S -shaped curve in a body part.
- sign the pledge — to make a vow to abstain from alcoholic drink
- significatively — serving to signify.
- silent majority — the U.S. citizens who supported President Nixon's policies but who were not politically vocal, outspoken, or active: considered by him to constitute a majority.
- silicified wood — wood that has been changed into quartz by a replacement of the cellular structure of the wood by siliceous waters.
- silicon carbide — a very hard, insoluble, crystalline compound, SiC, used as an abrasive and as an electrical resistor in objects exposed to high temperatures.
- silicon dioxide — the dioxide form of silicon, SiO 2 , occurring especially as quartz sand, flint, and agate: used usually in the form of its prepared white powder chiefly in the manufacture of glass, water glass, ceramics, and abrasives.
- silicone rubber — any of the synthetic rubbers made from silicone elastomers.
- silver chloride — a white, granular, water-insoluble powder, AgCl, that darkens on exposure to light, produced by the reaction of silver nitrate with a chloride: used chiefly in the manufacture of photographic emulsions and in the making of antiseptic silver preparations.
- silver fluoride — a yellow or brownish, crystalline, water-soluble, hygroscopic solid, AgF, used chiefly as an antiseptic and disinfectant.
- silver quandong — an Australian tree, Elaeocarpus grandis: family Elaeocarpaceae
- silver standard — a monetary standard or system using silver of specified weight and fineness to define the basic unit of currency.
- silviculturally — with reference to silviculture
- simeon stylites — Saint, a.d. 390?–459, Syrian monk and stylite.
- simian virus 40 — SV 40.
- simple division — a type of division to find out how many times the smaller number is contained in the larger one
- simple equation — linear equation
- simple fraction — a ratio of two integers.
- simple fracture — a fracture in which the bone does not pierce the skin.
- simple interest — interest payable only on the principal; interest that is not compounded.
- simple interval — an interval of an octave or less.
- simple majority — less than half of the total votes cast but more than the minimum required to win, as when there are more than two candidates or choices.
- simple pendulum — a hypothetical apparatus consisting of a point mass suspended from a weightless, frictionless thread whose length is constant, the motion of the body about the string being periodic and, if the angle of deviation from the original equilibrium position is small, representing simple harmonic motion (distinguished from physical pendulum).
- simple sentence — a sentence having only one clause, as I saw her the day before yesterday.
- simplicidentate — belonging or pertaining to the Simplicidentata, formerly regarded as a suborder or division of rodents having only one pair of upper incisor teeth.
- sinai peninsula — broad peninsula in NE Egypt, between the Gulf of Suez & the Gulf of Aqaba
- sinclair, clive — Clive Sinclair
- singapore sling — a cocktail of gin, cherry brandy, sugar, and water.
- singing teacher — a teacher who gives instruction in how to sing
- single currency — a currency that is common to different countries
- single standard — a single set of principles or rules applying to everyone, as a single moral code applying to both men and women, especially in sexual behavior. Compare double standard.
- single-breasted — (of a coat, jacket, etc.) having a front closure directly in the center with only a narrow overlap secured by a single button or row of buttons.
- single-cut file — a file with teeth in one direction only: used for filing soft material
- single-handedly — in a single-handed manner; single-handed.
- single-sideband — of or pertaining to a system of radio transmission in which one of the two sidebands produced during modulation is suppressed
- sinistrodextral — moving or extending from the left to the right.
- sink a borehole — To sink a borehole means to drill a deep hole in the ground.
- sinkiang uighur — an autonomous region in NW China, bordering Tibet, Mongolia, Kazakhstan, Kirghizia, Tadzhikistan, Pakistan, and India: formerly a province. 635,830 sq. mi. (1,646,800 sq. km). Capital: Ürümqi.
- sinoatrial node — a small mass of tissue in the right atrium functioning as pacemaker of the heart by giving rise to the electric impulses that initiate heart contractions.
- sinorespiratory — of, relating to, or affecting the paranasal sinuses and the respiratory tract.
- sir arthur john — Sir (Arthur) John, 1904–2000, English actor and director.
On this page, we collect all 15-letter words starting with SI. It’s easy to find right word with a certain length. It is the easiest way to find 15-letter word that beginning with SI to use in Scrabble or Crossword puzzles.