• Oakmoss

    Origin

    oak + moss

    Full definition of oakmoss

    Noun

    oakmoss

    (uncountable)
    1. Evernia prunastri, a lichen found primarily on oak trees.
      • 2007, October 7, Chandler Burr, Wood Wins, He shellacked them with smoky labdanum, oakmoss and incense black as pitch.
    © Wiktionary