%ripidolite%

n. [ Gr. &unr_;&unr_;&unr_;. &unr_;&unr_;&unr_;. fan + -lite. ] (Min.) A translucent mineral of a green color and micaceous structure, belonging to the chlorite group; a hydrous silicate of alumina, magnesia, and iron; -- called also clinochlore. [ 1913 Webster ]