from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A yellowish, fluorescent minor ore of uranium with the composition Ca(UO2)2(PO4)2·10-12H2O.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A yellow mineral with tetragonal crystals, Ca(UO2)2(PO4)2·10-12H2O.
from the GNU version of the Collaborative International Dictionary of English
- n. A lemon-yellow phosphate of uranium and calcium occurring in tabular crystals with basal cleavage, and in micalike scales. H., 2-2.5. Sp. gr., 3.05-3.19.
from The Century Dictionary and Cyclopedia
- n. A native hydrous phosphate of uranium and calcium, occurring in tabular crystals, nearly square in form, and of a citron or sulphur-yellow color.
After Autun, a city of east-central France.(American Heritage® Dictionary of the English Language, Fourth Edition)