This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A gray, fine-grained volcanic rock, chiefly plagioclase and feldspar.

n. A class of fine-grained intermediate igneous rock, of volcanic origin, containing mostly plagioclase feldspar.

n. An eruptive rock allied to trachyte, consisting essentially of a triclinic feldspar, with pyroxene, hornblende, or hypersthene.

n. A volcanic rock of wide-spread occurrence, especially in the Cordilleran region of North America.

n. a dark grey volcanic rock

"A third type of magma, called andesite, named after the Andes Mountains where it is often found, is composed of a mixture of both felsic and mafic magma."

igneous rock   

trachytic andesite   

greenstone    trachyte    double-peaked    peridot    long-extinct    diorite    conical-shaped    uprooting    cornelian    strato