Part of a mosaic (4)
I believe the answer is:
tile
(Other definitions for tile that I've seen before include "Thin slab of ceramic or slate" , "Flat, thin slab to cover surface" , "Roofing material" , "9 for the roof?" , "Scrabble piece" .)
I believe the answer is:
tile
(Other definitions for tile that I've seen before include "Thin slab of ceramic or slate" , "Flat, thin slab to cover surface" , "Roofing material" , "9 for the roof?" , "Scrabble piece" .)