analcime

noun

anal·​cime ə-ˈnal-ˌsēm 

: a white or slightly colored mineral that consists of hydrated silicate of sodium and aluminum and occurs in various igneous rocks in massive form or in crystals

Word History

Etymology

French, from Greek analkimos weak, from an- + alkimos strong, from alkē strength

First Known Use

1901, in the meaning defined above