Dictionary definitions
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knockstone
From The Collaborative International Dictionary of English v.0.48:
Knockstone \Knock"stone`\, n. (Mining) A block upon which ore is broken up. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Knockstone \Knock"stone`\, n. (Mining) A block upon which ore is broken up. [1913 Webster]