Definition of nepheline
: a hexagonal mineral that is a usually glassy crystalline silicate of sodium, potassium, and aluminum common in igneous rocks
nephelinicplay \ˌne-fə-ˈli-nik\ adjective
Learn More about nepheline
Britannica.com: Encyclopedia article about nepheline
Seen and Heard
What made you want to look up nepheline? Please tell us where you read or heard it (including the quote, if possible).