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A soapy mixture obtained by treating an essential oil with an alkali; hence, any similar compound of an essential oil. [Written also saponule.] [Obs.]

ffinity satisfied; combined with all it can hold; - - said of certain atoms, radicals, or compounds; thus, methane is a saturated compound. Contrasted with unsaturated.

The calcareous or hornlike coral forming the central stem or axis of most compound alcyonarians; -- called also foot secretion. See Illust. under Gorgoniacea, and Coenenchyma. -- Scler`o*ba"sic, a.

stacean; as, the skeleton screw (Caprella). See Sand screw, under Sand. Archimedes screw, Compound screw, Foot screw, etc. See under Archimedes, Compound, Foot, etc. -- A screw loose, something out of order, so that work is not done smoothly; as, there is a screw loose somewhere. H. Martineau. -- Endless, or perpetua…

An American compound ascidian (Amoræcium stellatum) which forms large whitish masses resembling salt pork.

A compound of the resinous materials, pigments, etc., used as a material for seals, as for letters, documents, etc.

part divided or cut off; a section; a portion; as, a segment of an orange; a segment of a compound or divided leaf.

ining 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.

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.

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…

Same; particular; very; identical. [Obs., except in the compound selfsame.] "On these self hills." Sir. W. Raleigh. To shoot another arrow that self way Which you did shoot the first. Shak. At that self moment enters Palamon. Dryden.

Containing, or acting as, a base in the proportions of a sesqui compound.

A salt derived from a sesquioxide base, or made up on the proportions of a sesqui compound.

Pertaining 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.

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

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…