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Webster 1913 Edition

Wacky

{

Wack′e

,

Wack′y

, }
Noun.
[G.
wacke
, MHG.
wacke
a large stone, OHG.
waggo
a pebble.]
(Geol.)
A soft, earthy, dark-colored rock or clay derived from the alteration of basalt.

Webster 1828 Edition

Wacky

WACKY

,
Noun.
A rock nearly allied to basalt, of which it may be regarded as a more soft and earthy variety. Its color is a greenish gray, brown or black. It is opake, yields easily to the knife, and has a greasy feel. Its principal ingredient is silex. Gray wacky is a different species of rock, being a kind of sandstone. Wacky is a mineral sunstance intermediate between clay and basalt.

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