ptilolite

== English == === Etymology === A classical compound of ptilo- +‎ -lite, so named on account of its feather-like, threaded appearance. === Noun === ptilolite (countable and uncountable, plural ptilolites) (mineralogy, dated) Mordenite; once designated as a new mineral, it was discovered to be identical with mordenite. ==== Derived terms ==== === References === === Further reading === “ptilolite”, in Mindat.org: Glossary, Keswick, Va.: Hudson Institute of Mineralogy, 2000–2026.