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or the pivot of a capstan. Flying saucer, a type of Unidentified Flying Object, having a biconvex discoid shape; such objects are occasionally reported to have been sighted, but no example of one has been reliably shown to exist. They are believed by ufologists to originate in outer space, but they are generally presum…

Silicon dioxide, SiO

Combined or impregnated with silicon or silica; as, silicated hydrogen; silicated rocks. Silicated soap, a hard soap containing silicate of soda.

aining to, derived from, or resembling, silica; specifically, designating compounds of silicon; as, silicic acid. Silicic acid (Chem.), an amorphous gelatinous substance, Si(HO)4, very unstable and easily dried to silica, but forming many stable salts; -- called also orthosilicic, or normal silicic, acid.…

A binary compound of silicon, or one regarded as binary. [R.] Hydrogen silicide (Chem.), a colorless, spontaneously inflammable gas, SiH4, produced artifically from silicon, and analogous to methane; -- called also silico-methane, silicon hydride, and formerly siliciureted hydrogen.

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.

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

To convert into, or to impregnate with, silica, or with the compounds of silicon. The specimens found . . . are completely silicified. Say.

See Silicon.

Combined or impregnated with silicon. [Obsoles.] Siliciureted hydrogen. (Chem.) Hydrogen silicide. [Obs.]

A combining form (also used adjectively) denoting the presence of silicon or its compounds; as, silicobenzoic, silicofluoride, etc.

Containing, or composed of, silicon and fluorine; especially, denoting the compounds called silicofluorides. Silicofluoric acid (Chem.), a compound of hydrofluoric acid and silicon fluoride, known only in watery solution. It is produced by the action of silicon fluoride on water, and is regarded as an acid, H2SiF6, and…

Of, pertaining to, or designating, any one of a series of double acids of silicon and tungsten, known in the free state, and also in their salts (called silicotungstates).

A form of silicon carbide, produced in the electric furnace, possessing great hardness, and high electrical resistance, and not subject to oxidation below 2880º F., or 1600º C.

within the tube in vibration, causing sound. The apparatus is called also chemical harmonicon. -- Singing master, a man who teaches vocal music. -- Singing school, a school in which persons are instructed in singing.

on which is a picture or delineation to be exhibited by means of a magic lantern, stereopticon, or the like; a plate on which is an object to be examined with a microscope.

Any one of several species of large wading birds of the family Ciconidæ, having long legs and a long, pointed bill. They are found both in the Old World and in America, and belong to Ciconia and several allied genera. The European white stork (Ciconia alba) is the best known. It commonly makes its nests on the top of a…

to Teleosaurus and allied genera. These reptiles are related to the crocodiles, but have biconcave vertebræ.

A group of fossil saurians having biconcave vertebræ and the teeth implanted in sockets.

Same as Tyrotoxicon.