rhyolithic

== English == === Etymology === From German Rhyolith (“rhyolite”) + -ic, presumably under influence from -lithic. === Adjective === rhyolithic (comparative more rhyolithic, superlative most rhyolithic) (obsolete) Alternative form of rhyolitic: composed of or related to rhyolite. 1884, "St Paul" in the Encyclopaedia Britannica, 9th ed., Vol. XXI, p. 189: According to M. Vélain, the island originally rose above the ocean as a mass of rhyolithic trachyte similar to that which still forms the Nine Pin rock to the north of the entrance to the crater. === References === “rhyolitic, adj.”, in OED Online ⁠, Oxford: Oxford University Press, 2010.