slate
/sleɪt/noun
Definitions
A fine-grained homogeneous sedimentary rock composed of clay or volcanic ash which has been metamorphosed so that it cleaves easily into thin layers.
The bluish-grey colour of most slate.
A chalkboard, sheet of slate for writing on with chalk or with a thin rod of slate (a slate pencil) formerly commonly used by both students and teachers in schools
A roofing-tile made of slate.
adjective
Definitions
Having the bluish-grey/gray colour of slate.