Growan
Webster's Revised Unabridged Dictionary
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Growan
(Mining) A decomposed granite, forming a mass of gravel, as in tin lodes in Cornwall.
Century Dictionary and Cyclopedia
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(n)
growan
Granite.
Etymology
Webster's Revised Unabridged Dictionary Cf. Arm. grouan, gravel, Corn. grow, gravel, sand
Usage in literature
They occur both in the "killas" or clay-slate, and in the "growan" or granite. "Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3" by
First known as "moorstone" or "growan. "Pottery, for Artists Craftsmen & Teachers" by