whinstone noun.
['wɪnstǝʊn] E16.[from WHIN noun1 + STONE noun.]1. Any of various hard dark-coloured rocks or stones,
esp. compact igneous rocks, as basalt, dolerite, etc.; greensand, chert, etc.
E16.2. A boulder or slab of this.
L16. [TahlilGaran] English Dictionary ▲