am·o·site 
(ămə-sīt′, -zīt′)
(ămə-sīt′, -zīt′)n.
A gray to brown iron-rich variety of asbestos that is a fibrous form of an amphibole mineral.
[After Amosa Ltd., South African company mining this mineral, from A(sbestos) M(ines) o(f) S(outh) A(frica).]