Hard intrusive igneous rock found in Cornwall, England, typically quartz porphyry.
More example sentences
- Less frequently elvan has been met with in apparently isolated masses.
- Molybdenite and corundum are also found in the schist through which the elvan dykes have cut.
early 18th century: perhaps via Cornish from Welsh elfen 'element'.
Definition of elvan in:
- The British & World English dictionary