Definition of sea coal in English:

sea coal

noun

mass nounarchaic
  • Mineral coal, as distinct from other types of coal such as charcoal.

    • ‘In 1306 King Edward I of England issued a proclamation banning the use of sea coal in London due to the smoke it caused.’
    • ‘However, a more likely explanation is that sea-coal was originally found in a washed-up form on the beaches of the North-East and other parts of the country.’