SILICON n.
A nonmetalic element analogous to carbon. It always occurs combined in nature, and is artificially obtained in the free state, usually as a dark brown amorphous powder, or as a dark crystalline substance with a meetallic luster. Its oxide is silica, or common quartz, and in this form, or as silicates, it is, next to ox…
SILVER n.
A soft white metallic element, sonorous, ductile, very malleable, and capable of a high degree of polish. It is found native, and also combined with sulphur, arsenic, antimony, chlorine, etc., in the minerals argentite, proustite, pyrargyrite, ceragyrite, etc. Silver is one of the "noble" metals, so-called, not being e…
SODIUM n.
A common metallic element of the alkali group, in nature always occuring combined, as in common salt, in albite, etc. It is isolated as a soft, waxy, white, unstable metal, so readily oxidized that it combines violently with water, and to be preserved must be kept under petroleum or some similar liquid. Sodium is used…
SOFT a.
Belonging to the class of sonant elements as distinguished from the surd, and considered as involving less force in utterance; as, b, d, g, z, v, etc., in contrast with p, t, k, s, f, etc. Soft clam (Zoöl.), the common or long clam (Mya arenaria). See Mya. -- Soft coal, bituminous coal, as distinguished from anthracit…
SONANT a.
Uttered, as an element of speech, with tone or proper vocal sound, as distinguished from mere breath sound; intonated; voiced; tonic; the opposite of nonvocal, or surd; -- sid of the vowels, semivowels, liquids, and nasals, and particularly of the consonants b, d, g hard, v, etc., as compared with their cognates p, t,…
SPERMATOZOID n.
The male germ cell in animals and plants, the essential element in fertilization; a microscopic animalcule-like particle, usually provided with one or more cilia by which it is capable of active motion. In animals, the familiar type is that of a small, more or less ovoid head, with a delicate threadlike cilium, or tail…
STANNOUS a.
Pertaining to, or containing, tin; specifically, designating those compounds in which the element has a lower valence as contrasted with stannic compounds. Stannous chloride (Chem.), a white crystalline substance, SnCl2.(H2O)2, obtained by dissolving tin in hydrochloric acid. It is used as a mordant in dyeing.…