12-letter words starting with si
- sialadenitis — inflammation of one or more of the salivary glands.
- siamese twin — (not in technical use) conjoined twin.
- side against — one of the surfaces forming the outside of or bounding a thing, or one of the lines bounding a geometric figure.
- side by side — one of the surfaces forming the outside of or bounding a thing, or one of the lines bounding a geometric figure.
- side circuit — a circuit derived from two suitably arranged pairs of wires, each pair being a circuit (side circuit) and also acting as one half of an additional derived circuit, the entire system providing the capabilities of three circuits while requiring wires for only two.
- side-wheeler — having a paddle wheel on each side, as a steamboat.
- sidereal day — the interval between two successive passages of the vernal equinox over the meridian, being about four minutes shorter than a mean solar day.
- siderochrome — any of various chemical compounds functioning in the transport of iron in bacteria.
- siderography — the art or technique of engraving on steel.
- siderophilic — having characteristics of siderophile
- sidesplitter — something that is uproariously funny, as a joke or a situation.
- sidestepping — the act of ascending or descending by facing sideways and lifting each ski alternately
- sierra leone — an independent republic in W Africa: member of the Commonwealth of Nations; formerly a British colony and protectorate. 27,925 sq. mi. (72,326 sq. km). Capital: Freetown.
- sierra madre — a mountain range extending from S Wyoming into N Colorado.
- sierra vista — a town in S Arizona.
- sieve-plates — an elongated cell whose walls contain perforations (sieve pores) that are arranged in circumscribed areas (sieve plates) and that afford communication with similar adjacent cells.
- sight screen — a white screen set in line with the wicket as an aid to the batsman in seeing the ball when it is bowled.
- sight unseen — the power or faculty of seeing; perception of objects by use of the eyes; vision.
- sightseeings — the act of visiting and seeing places and objects of interest.
- sigismund ii — called Sigismund Augustus. 1520–72, king of Poland (1548–72), who united Poland, Lithuania, and their dependencies by the Union of Lublin (1569)
- sigma baryon — an unstable hyperon having positive, negative, or zero electric charge and strangeness −1. Symbol: Σ.
- sign a check — When you sign a check , you write your name on it in a special space in order to validate it.
- sign-posting — a post bearing a sign that gives information or guidance.
- signal board — a board for displaying electrically transmitted signals and indicating their source.
- signal corps — a branch of the army responsible for military communications, meteorological studies, and related work.
- signal tower — a tower from which railway signals are controlled or displayed
- significance — importance; consequence: the significance of the new treaty.
- significancy — significance.
- significants — important; of consequence.
- significator — a planet deemed significant in astrology
- sikandarabad — Secunderabad.
- silas marner — a novel (1861) by George Eliot.
- silbury hill — the largest prehistoric artificial mound in Europe, located near Avebury, England, and dating from 2600 b.c.
- silent alarm — an alarm that alerts security personnel or the police without the knowledge of the intruder or criminal whose presence triggers it: The silent alarm set off a flashing light at the police station.
- silhouetting — a two-dimensional representation of the outline of an object, as a cutout or configurational drawing, uniformly filled in with black, especially a black-paper, miniature cutout of the outlines of a person's face in profile.
- silhouettist — a creator of silhouette portraits
- silica glass — a very clear, strong glass produced when pure silica is fused at high temperature, used as in optical instruments
- silicic acid — any of certain amorphous gelatinous masses, formed when alkaline silicates are treated with acids, which dissociate readily into silica and water.
- silicicolous — thriving in siliceous soil
- siliciferous — containing, combined with, or producing silica.
- silicon chip — A silicon chip is a very small piece of silicon inside a computer. It has electronic circuits on it and can hold large quantities of information or perform mathematical or logical operations.
- silicon glen — a collective term for the industries in Scotland associated with information technology, esp those concentrated in the central conurbation between Glasgow and Edinburgh
- silk factory — plant where silk fabric is produced
- silky cornel — a cornel, Cornus amomum, of the eastern U.S., having leaves covered with short, silky hairs on the underside and bearing blue berries.
- silly season — a time of year, usually in midsummer or during a holiday period, characterized by exaggerated news stories, frivolous entertainments, outlandish publicity stunts, etc.: The new movie reminds us that the silly season is here.
- silver belly — a freshwater eel
- silver birch — tree with silvery-white bark
- silver bream — a type of ray-finned fish from the family Cyprinidae
- silver frost — glaze (def 17).
- silver jenny — a silvery mojarra, Eucinostomus gula, inhabiting warm waters of the western Atlantic Ocean, along sandy shores.
On this page, we collect all 12-letter words starting with SI. It’s easy to find right word with a certain length. It is the easiest way to find 12-letter word that beginning with SI to use in Scrabble or Crossword puzzles.