from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun An amorphous, translucent, variously colored mineral, essentially hydrous aluminum silicate.
from The Century Dictionary.
- noun A mineral of a pale-blue, and sometimes of a green or brown, color.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mineralogy An
amorphous hydrous aluminium silicate clay mineral.
from The American Heritage® Dictionary of the English Language, 4th Edition
[From Greek allophanēs, appearing otherwise : allos, other; see allo– + phainesthai, phan-, to appear, passive of phainein, to show; see bhā- in Indo-European roots.]
from Wiktionary, Creative Commons Attribution/Share-Alike License
allo- + phane
Volcanic deposits have a unique process of weathering that causes the accumulation of allophane and oxides of iron and aluminum in developing soils.