Definition of greisen in English:


Syllabification: grei·sen
Pronunciation: /ˈgrīzən


  • A light-colored rock containing quartz, mica, and fluorine-rich minerals, resulting from the alteration of granite by hot vapor from magma.
    More example sentences
    • A greisen is a quartz - mica aggregate containing significant amounts of cassiterite, wolframite, fluorite, topaz, rutile, and tourmaline.
    • It has been collected in a road cut near Grant Mills, Cumberland, Rhode Island; in Stratford, Fairfield County, Connecticut; and in greisen with purple fluorite at Irish Creek, Rockbridge County, Virginia.
    • Eventually we reached the site, a few trenches along veins of greisen.


late 19th century: from German, probably a dialect word, from greis 'gray with age'.

More definitions of greisen

Definition of greisen in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day skosh
Pronunciation: skōSH
a small amount; a little