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A nonmetallic element of the sulphur group, and analogous to sulphur in its compounds. It is found in small quantities with sulphur and some sulphur ores, and obtained in the free state as a dark reddish powder or crystalline mass, or as a dark metallic- looking substance. It exhibits under the action of light a remark…

ent that in combination produces amphid salt; -- applied by Berzelius to oxygen, sulphur, selenium, and tellurium. [R.]

A selenide containing two atoms of selenium in each molecule.

o called by Berzelius on account of its being found soon after the discovery of the metal selenium.

A cell (as one of two electrodes embedded in selenium) which by exposure to light generates an electric current.

the variations of the arc due to sound waves are obtained for reproduction by means of a selenium cell and a telephone.

Of or pertaining to selenium; derived from, or containing, selenium; specifically, designating those compounds in which the element has a higher valence as contrasted with selenious compounds.

A binary compound of selenium, or a compound regarded as binary; as, ethyl selenide.

Containing, or impregnated with, selenium; as, seleniferous pyrites.

A combining form (also used adjectively) denoting the presence of selenium or its compounds; as, selenio-phosphate, a phosphate having selenium in place of all, or a part, of the oxygen.

Of, pertaining to, or containing, selenium; specifically, designating those compounds in which the element has a lower valence as contrasted with selenic compounds.

Combined with selenium as in a selenide; as, seleniureted hydrogen. [Written also seleniuretted.] [Obsoles.]

A hypothetical radical of selenium, analogous to sulphonium. [R.]

as a positive or negative. The transmitter includes a camera obscura and a row of minute selenium cells. The receiver includes an oscillograph, ralay, equilibrator, and an induction coil the sparks from which perforate a paper with tiny holes that form the image.

A rare nonmetallic element, analogous to sulphur and selenium, occasionally found native as a substance of a silver-white metallic luster, but usually combined with metals, as with gold and silver in the mineral sylvanite, with mercury in Coloradoite, etc. Symbol Te. Atomic weight 125.2. Graphic tellurium. (Min.) See S…

te; -- said especially with reference to the condition of certain substances, as sulphur, selenium, etc., when condensed from the vaporous state and deposited upon cold bodies, in which case they assume the form of small globules filled with liquid.