• Chambers's Twentieth Century Dictionary
    • Polishing-slate a mineral used for polishing glass, marble, and metals, composed chiefly of silica, with a little alumina, lime, oxide of iron, and water
    • ***


Chambers's Twentieth Century Dictionary
O. Fr. polir, polissant—L. polīre, to make to shine.


In literature:

Rubber bands, beans, slate pencils, and polishing wax!
"The Rover Boys in New York" by Arthur M. Winfield
The subjacent rocks, also, of gneiss, mica slate, and quartz, are everywhere grooved and polished as if by the passage of a glacier.
"The Geological Evidence of The Antiquity of Man" by Charles Lyell
This is a very fine specimen, of yellow polished slate of about the same texture as the preceding one.
"Illustrated Catalogue Of The Collections Obtained From The Indians Of New Mexico And Arizona In 1879" by James Stevenson
Half an hour's polishing with a slate-backed pitch tool and rouge and water will enable an optical test to be made.
"On Laboratory Arts" by Richard Threlfall

In news:

Almost everyone in Roger High School's production of "Godspell," slated to open Thursday, is a theatre rookie, but they intend to make their school's first musical a polished one.
If the sealer is a penetrating sealer, it is in the slate and should not be harmed by polishing even if there — Lynn E. Maintenance Management Online.
Thursday's Ask the Experts: Polished slate maintenance.