from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A monoclinic-prismatic mineral containing hydrogen, iron, magnesium, manganese, oxygen, and phosphorus.
from the GNU version of the Collaborative International Dictionary of English
- n. A mineral occurring in small, green, transparent, monoclinic crystals. It is a hydrous phosphate of iron.
from The Century Dictionary and Cyclopedia
- n. A hydrous phosphate of iron, occurring in bright-green monoclinic crystals. It is found near Truro in Cornwall, and is associated with vivianite in cavities in pyrite.