D defs.my
Entry 1 sense Webster, 1913

Fibrolite

· Fi·bro·lite · IPA
01 n. A silicate of alumina, of fibrous or columnar structure. It is like andalusite in composition; -- called also sillimanite, and bucholzite.
  1. 1.
    A silicate of alumina, of fibrous or columnar structure. It is like andalusite in composition; -- called also sillimanite, and bucholzite.(Min.) Also: sillimanite, bucholzite