having the form of a bunch of grapes:
botryoidal hematite.
Historical Examples

A Manual of Elementary Geology Charles Lyell.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 Various
Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 Various
Adrift in the Arctic Ice Pack Elisha Kent Kane
Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 9 Various
Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 9 Various

(of minerals, parts of plants, etc) shaped like a bunch of grapes
Shaped like a bunch of grapes. Certain minerals and parts of organisms can be botryoidal.


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