calx

sammuttamaton kalkki puhekieltä The substance which remains after a metal or mineral has been thoroughly burnt, seen as being the essential substance left after the expulsion of phlogiston.
(Now recognised as being) the oxide left after calcination of a metal.
calcium oxide
In the Eton College wall game, an area at the end of the field where a shy can be scored by lifting the ball against the wall with one's foot.
limestone
chalk
the finish line
(label) heel (qualifier)