from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A borosilicate of aluminum, iron, and lime, commonly found in glassy, brown crystals with acute edges.
from the GNU version of the Collaborative International Dictionary of English
- n. A borosilicate of alumina, iron, and lime, commonly found in glassy, brown crystals with acute edges.
from The Century Dictionary and Cyclopedia
- n. A mineral occurring commonly in crystals, whose general form is that of a very oblique rhomb, so flattened that some of its edges become thin and sharp like the edge of an ax (whence its name), also sometimes found in lamellar masses.
Sorry, no etymologies found.