Zoisite
Etymology: from Van Zois , its discoverer.
Definitions
1
ZOI'SITE , noun [from Van Zois , its discoverer.]
2
A mineral regarded as a variety of epidote. It occurs in deeply striated rhomboidal prisms, much compressed and rounded; its colors gray, yellowish or bluish gray, brown, grayish yellow, or reddish white.
3
This is called also a subspecies of prismatoidal augite.
Source: American Dictionary of the English Language (1828 Edition), MDX derived from public Internet Archive item. Private-use review; confirm rights before public redistribution