Webster 1913 Edition
[Gr. [GREEK] to give besides; [GREEK] over + [GREEK] to give: cf. F.
épidote. So named from the
enlargementof the base of the primary, in some of the secondary forms.]
A mineral, commonly of a yellowish green (pistachio) color, occurring granular, massive, columnar, and in monoclinic crystals. It is a silicate of alumina, lime, and oxide of iron, or manganese.
Epidote groupincludes ordinary epidote, zoisite or
lime epidote, piedmontite or
manganese epidote, allanite or
Webster 1828 Edition
A mineral occurring in lamellar, granular or compact masses, in loose grains, or in prismatic crystals of six or eight sides, and sometimes ten or twelve. Its color is commonly some shade of green, yellowish, bluish or blackish green. It has two varieties, zoisite and aranaceous or granular epidote.
Epidote is granular or manganesian.