Definition of ptilolite in English:
ptilolite
noun
historical Mineralogy
A mineral now recognized as identical with mordenite.
Pronunciation
ptilolite
/ˈtɪlə(ʊ)lʌɪt/ /ˈtʌɪlə(ʊ)lʌɪt/ Origin
Late 19th century; earliest use found in William Cross (1804–1886).