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silver surfer
silver-tongued
silverback
silverbell
silverberry
silvereye
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sima (2)
si·ma [ smə ]


noun 
Definition:
 
rock forming Earth's lower crust: the rocks that form the lower part of the Earth's crust, lying beneath the oceans and the continents and consisting mainly of silica and magnesia
[Early 20th century. <silica + magnesium]

si·ma·tic [ si máttik ] adjective
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