from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A hydrous aluminium sulfate mineral with formula Al2SO4(OH)4·7(H2O).
from the GNU version of the Collaborative International Dictionary of English
- n. A hydrous sulphate of alumina occurring in white reniform masses.
from The Century Dictionary and Cyclopedia
- n. In petrography, a phaneric, granular igneous rock composed of orthorhombic and monoclinic pyroxenes; a variety of pyroxenite.
- n. Aluminite; hydrous tribasic sulphate of aluminium, found in Sussex, England, and at Halle in Prussia, in reniform masses and botryoidal concretions of a white or yellowish-white color.
Sorry, no etymologies found.
Norway; Lady Chantrey's specimen of part of a coniferous tree, semi-opalised; and a mass of websterite from Newhaven, Sussex.