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Pertaining to or containing alum, or alumina; as, aluminous minerals, aluminous solution.

ium. It is the result of the wearing down and decomposition, in part, of rocks containing aluminous minerals, as granite. Lime, magnesia, oxide of iron, and other ingredients, are often present as impurities.

n black, or dark green or brown, variety of amphibole. (See Amphibole.) It belongs to the aluminous division of the species, and is also characterized by its containing considerable iron. Also used as a general term to include the whole species. Hornblende schist (Geol.), a hornblende rock of schistose structure.…

Of or pertaining to the isle of Lemnos. Lemnian bole, Lemnian earth, an aluminous earth of a grayish yellow color; sphragide; -- formerly sold as medicine, having astringent properties. -- Lemnian reddle, a reddle of firm consistence and deep red color; -- used by artificers in coloring.

A dark green aluminous variety of amphibole, or hornblende.

gray color, which absorbs water rapidly, and adheres to the tongue; whence the name. -- Aluminous slate, or Alum slate (Min.), a kind of slate containing sulphate of alumina, -- used in the manufacture of alum. -- Bituminous slate (Min.), a soft species of sectile clay slate, impregnated with bitumen. -- Hornblende…