See Also: anorthosite(dictionary)
anorthosite(encyclopedia)

anorthosite (iou)



anorthosite noun. M19.
[from French anorthose plagioclase, (now) anorthoclase + -ITE1: see ANORTHIC.]
Geology. A granular igneous rock composed largely of a plagioclase (usu. labradorite).
anortho'sitic adjective of the nature of anorthosite M20.