akrochordite
noun
ak·ro·chor·dite
ˌa-krō-ˈkȯr-ˌdīt
plural -s
: a mineral MgMn4(AsO4)2(OH)4·4H2O(?) consisting of a hydrous basic manganese magnesium arsenate occurring in reddish brown rounded aggregates (hardness 3, specific gravity 3.2)
Word History
Etymology
Greek akrochordōn wart + English -ite
First Known Use
1922, in the meaning defined above