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Webster 1913 Edition
Whinstone
Whin′stone′
,Noun.
[
Whin
+ stone
; cf. Scot. quhynstane
.] A provincial name given in England to basaltic rocks, and applied by miners to other kind of dark-colored unstratified rocks which resist the point of the pick. – for example, to masses of chert. Whin-dikes, and whin-sills, are names sometimes given to veins or beds of basalt.