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单词 gossan
释义 gossan
 /gos"euhn, goz"-/,  n.  
 a rust-colored deposit of mineral matter at the outcrop of a vein or orebody containing iron-bearing materials. Also called iron hat.
 [1770-80; orig. dial. (Cornwall) < Cornish, deriv. of gos blood; akin to Welsh gwaed]
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