from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A yellowish to black mineral, Fe2SiO4, of the olivine group.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Yellow, olive green, brown or black mineral with orthorhombic crystals of the olivine group, Fe2SiO4.
from the GNU version of the Collaborative International Dictionary of English
- n. A black, greenish, or brownish mineral of the chrysolite group. It is a silicate of iron.
from The Century Dictionary and Cyclopedia
- n. A black, greenish, or brownish, sometimes iridescent, mineral, consisting mainly of silicate of iron and belonging to the chrysolite group.
German Fayalit, from Fayal, Faial.(American Heritage® Dictionary of the English Language, Fourth Edition)
fayal (“Faial Island in the Azores”) + -ite. Named in 1840. (Wiktionary)