Etymology
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seacoal (n.)

also sea-coal, old name for "mineral coal, fossil coal" (as opposed to charcoal), late 13c., secol; earlier, in Old English, it meant "jet," which chiefly was found washed ashore by the sea. See sea + coal (n.). The coal perhaps was so called for its resemblance to jet, or because it was first dug from beds exposed by wave erosion. As it became the predominant type used, the prefix was dropped.

updated on March 09, 2022

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