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Siennese

Of or pertaining to Sienna, a city of Italy.

Sierra

A ridge of mountain and craggy rocks, with a serrated or irregular outline; as, the Sierra Nevada.

Siesta

A short sleep taken about the middle of the day, or after dinner; a midday nap.

Sieur

Sir; -- a title of respect used by the French.

Sieva

A small variety of the Lima bean (Phaseolus lunatus).

Sieve

A utensil for separating the finer and coarser parts of a pulverized or granulated substance from each other. It consist of a vessel, usually shallow, with the bottom perforated, or made of hair, wire, or the like, woven in meshes.

Sifac

The white indris of Madagascar. It is regarded by the natives as sacred.

Sifflement

The act of whistling or hissing; a whistling sound; sibilation.

Sifilet

The six-shafted bird of paradise. See Paradise bird, under Paradise.

Sift

To separate with a sieve, as the fine part of a substance from the coarse; as, to sift meal or flour; to sift powder; to sift sand or lime.

Sifter

One who, or that which, sifts.

Sigaultian

Pertaining to Sigault, a French physician. See Symphyseotomy.

Sigh

A deep and prolonged audible inspiration or respiration of air, as when fatigued or grieved; the act of sighing.

Sighing

Uttering sighs; grieving; lamenting.

Sight

To take aim by a sight.

Sight-seeing

The act of seeing sights; eagerness for novelties or curiosities.

Sight-seer

One given to seeing sights or noted things, or eager for novelties or curiosities.

Sight-shot

Distance to which the sight can reach or be thrown.

Sighted

Having sight, or seeing, in a particular manner; -- used in composition; as, long-sighted, short-sighted, quick-sighted, sharp-sighted, and the like.

Sightful

Easily or clearly seen; distinctly visible; perspicuous.

Sightless

Lacking sight; without sight; blind.

Sightliness

The state of being sightly; comeliness; conspicuousness.

Sightly

Pleasing to the sight; comely.

Sightsman

One who reads or performs music readily at first sight.

Sigil

A seal; a signature.

Sigillaria

A genus of fossil trees principally found in the coal formation; -- so named from the seallike leaf scars in vertical rows on the surface.

Sigillarid

One of an extinct family of cryptagamous trees, including the genus Sigillaria and its allies.

Sigillated

Decorated by means of stamps; -- said of pottery.

Sigillative

Fit to seal; belonging to a seal; composed of wax.

Sigla

The signs, abbreviations, letters, or characters standing for words, shorthand, etc., in ancient manuscripts, or on coins, medals, etc.

Sigma

The Greek letter /, /, or / (English S, or s). It originally had the form of the English C.

Sigmodont

Any one of a tribe (Sigmodontes) of rodents which includes all the indigenous rats and mice of America. So called from the form of the ridges of enamel on the crowns of the worn molars. Also used adjectively.

Sign

To be a sign or omen.

sign language

A form of language for communicating by use of gestures made by the hands, rather than by speech. It includes alphabets made by hand gestures, as well as proper languages formed from signs. Among the latter is the American Sign Language (ASL), used by the deaf. See also dactylology.

sign off

To terminate a communication, especially one conducted by radio waves; to terminate a broadcast over radio or television; as, this is your reporter in Cairo, signing off.

sign on

To begin a communication, especially one conducted by radio waves.

Signable

Suitable to be signed; requiring signature; as, a legal document signable by a particular person.

Signal

To communicate by signals; as, to signal orders.

Signal to noise Signal to noise ratio

The ratio of the intensity of a signal{2} to the background noise detected by a measuring instrument, especially in a communications channel; the higher the ratio, the more accurately the information contained can be interpreted. The term is applied not only to human communications, but to the detection of information in any system that is being studied to gain knowledge; as, the signal-to-noise ratio of light signals in older optic fibers drops to an unusable level after several miles..

Signalist

One who makes signals; one who communicates intelligence by means of signals.

Signality

The quality or state of being signal or remarkable.

Signalize

To make signal or eminent; to render distinguished from what is common; to distinguish.

Signalman

A man whose business is to manage or display signals; especially, one employed in setting the signals by which railroad trains are run or warned.

Signalment

The act of signaling, or of signalizing; hence, description by peculiar, appropriate, or characteristic marks.

Signate

Having definite color markings.

Signatory

A signer; one who signs or subscribes; as, a conference of signatories.

Signature

To mark with, or as with, a signature or signatures.

Signaturist

One who holds to the doctrine of signatures impressed upon objects, indicative of character or qualities.

Signboard

A board, placed on or before a shop, office, etc., on which ssome notice is given, as the name of a firm, of a business, or the like.

Signer

One who signs or subscribes his name; as, a memorial with a hundred signers.

Signet

A seal; especially, in England, the seal used by the sovereign in sealing private letters and grants that pass by bill under the sign manual; -- called also privy signet.

Signeted

Stamped or marked with a signet.

Significant

That which has significance; a sign; a token; a symbol.

Significate

One of several things signified by a common term.

Signification

The act of signifying; a making known by signs or other means.

Significavit

Formerly, a writ issuing out of chancery, upon certificate given by the ordinary, of a man's standing excommunicate by the space of forty days, for the laying him up in prison till he submit himself to the authority of the church.

Signify

To show by a sign; to communicate by any conventional token, as words, gestures, signals, or the like; to announce; to make known; to declare; to express; as, a signified his desire to be present.

signing

The procedure or process of communicating by use of a sign language.

Signior

Sir; Mr. The English form and pronunciation for the Italian Signor and the Spanish Se/or.

Signora

Madam; Mrs; -- a title of address or respect among the Italians.

Signore Signor

Sir; Mr.; -- a title of address or respect among the Italians. Before a noun the form is Signor.

Signorina

Miss; -- a title of address among the Italians.

Signpost

A post on which a sign hangs, or on which papers are placed to give public notice of anything.

Sikhs

A religious sect noted for warlike traits, founded in the Punjab at the end of the 15th century.

Sile

A young or small herring.

Silence

To compel to silence; to cause to be still; to still; to hush.

Silencer

One that silences; The muffler of an internal-combustion engine. Any of various devices to silence the humming noise of telegraph wires. A device for silencing the report of a firearm shooting its projectiles singly, as a tubular attachment for the muzzle having circular plates that permit the passage of the projectile but impart a rotary motion to, and thus retard, the exploding gases.

Silene

A genus of caryophyllaceous plants, usually covered with a viscid secretion by which insects are caught; catchfly.

Silent

That which is silent; a time of silence.

Silentiary

One appointed to keep silence and order in court; also, one sworn not to divulge secrets of state.

Silesia

A kind of linen cloth, originally made in Silesia, a province of Prussia.

Silesian

Of or pertaining to Silesia. A native or inhabitant of Silesia.

Silex

Silica, SiO2 as found in nature, constituting quarz, and most sands and sandstones. See Silica, and Silicic.

Silhouette

To represent by a silhouette; to project upon a background, so as to be like a silhouette.

Silica

Silicon dioxide, SiO/. It constitutes ordinary quartz (also opal and tridymite), and is artifically prepared as a very fine, white, tasteless, inodorous powder.

Silicated

Combined or impregnated with silicon or silica; as, silicated hydrogen; silicated rocks.

Siliceous

Of or pertaining to silica; containing silica, or partaking of its nature.

Silicic

Pertaining to, derived from, or resembling, silica; specifically, designating compounds of silicon; as, silicic acid.

Silicide

A binary compound of silicon, or one regarded as binary.

Silicification

Thae act or process of combining or impregnating with silicon or silica; the state of being so combined or impregnated; as, the silicification of wood.

Silicified

Combined or impregnated with silicon or silica, especially the latter; as, silicified wood.

Silicify

To become converted into silica, or to be impregnated with silica.

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