Slate

σχιστόλιθος

schistólithos

(having the bluish-grey colour of slate — see also blue-gray, slate blue, slate gray)

πλάκα

pláka

(piece, originally of certain types of stone and now of other materials, often in a frame, used for writing on)

πλακίδιο

plakídio

(piece of such stone used as a tile for flooring, roofing, etc.; such tiles collectively; material from which they are made)

σχιστόλιθος

schistólithos

(fine-grained homogeneous sedimentary rock)