• Webster's Revised Unabridged Dictionary
    • n Phyllite (Min) A mineral related to ottrelite.
    • ***
Century Dictionary and Cyclopedia
    • n phyllite One of the names given to clay-slate or argillaceous schist. It was introduced by Naumann as a substitute for the phyllade of D'Aubuisson. It is little used by authors writing in English. By some later lithologists phyllite has been used as the equivalent of ottrelite-slate a schistose rock containing fine lamellæ of the mineral ottrelite.
    • ***
Chambers's Twentieth Century Dictionary
    • n Phyllite fil′īt clay-slate or argillaceous schist
    • ***


Webster's Revised Unabridged Dictionary
See Phylo-
Chambers's Twentieth Century Dictionary
Gr.,—phyllon, a leaf.


In literature:

Near Rothesay and along the hill slopes west of Loch Fad there are parallel strips of grits and phyllites.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4" by Various
It occurs as isolated scales scattered through schistose rocks and phyllites of dynamo-metamorphic origin.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5" by Various
Geologically, the Erzgebirge range consists mainly of gneiss, mica and phyllite.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 7" by Various