Definition of alunite
: a mineral that consists of a hydrous potassium aluminum sulfate and occurs in massive form or in rhombohedral crystals
Origin of alunite
French, from alun alum
First Known Use: 1823
Learn More about alunite
Britannica.com: Encyclopedia article about "alunite"
Seen and Heard
What made you want to look up alunite? Please tell us where you read or heard it (including the quote, if possible).