amblygonite
noun
am·blyg·o·nite
amˈbligəˌnīt
plural -s
: a mineral (Li, Na)AlPO4(F, OH) consisting of basic lithium aluminum phosphate commonly containing sodium and fluorine and occurring in white cleavable masses
Word History
Etymology
German amblygonit, from Greek amblygōnios obtuse-angled (from ambly- + -gōnios, from gōnia angle) + German -it -ite
First Known Use
1820, in the meaning defined above