Definition of ptilolite in English:

ptilolite

Pronunciation /ˈtɪlə(ʊ)lʌɪt/ /ˈtʌɪlə(ʊ)lʌɪt/

noun

historical Mineralogy
  • A mineral now recognized as identical with mordenite.

Origin

Late 19th century; earliest use found in William Cross (1804–1886).