Definitions

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.

Etymologies

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