The Collaborative International Dictionary of English v.0.48:

Vulcanian \Vul*ca"ni*an\, a. [L. Vulcanius.]
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   1. Of or pertaining to Vulcan; made by Vulcan; hence, of or
      pertaining to works in iron or other metals.
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            Ingenious allusions to the Vulcanian panoply which
            Achilles lent to his feebler friend.  --Macaulay.
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   2. (Geol.) Volcanic.
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