from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A white, pearly hydrous aluminum oxide, AlO(OH), found in bauxite, corundum, and dolomite and used as a refractory and abrasive.
- n. Botany See disseminule.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A natural hydrate of aluminium, sometimes forming stalactites.
- n. A gemstone consisting of hydrate of aluminium in crystal form.
- n. seeds and fruit together regarded as a dispersal unit.
from the GNU version of the Collaborative International Dictionary of English
- n. A hydrate of alumina, often occurring in white lamellar masses with brilliant pearly luster; -- so named on account of its decrepitating when heated before the blowpipe.
from The Century Dictionary and Cyclopedia
- n. A hydrate of aluminium occurring in crystals and foliated masses, colorless or of a pearly gray. It is infusible, and a small fragment placed in the flame of a candle, or exposed to the flame of the blowpipe, almost instantly decrepitates and is dispersed: hence its name.
From Greek diasporā, dispersion, scattering; see Diaspora.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek διασπείρειυ ("to scatter"), describing its decrepitaton on heating. (Wiktionary)