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Webster 1913 Edition

Noun.

[From Professor Parker

Cleaveland

(Min.)

A variety of albite, white and lamellar in structure.

Noun.

A mineral, generally of a white or grayish white color, sometimes blue or bluish or reddish; called also siliceous felspar, or albite.

cleavelandite ‎(countable and uncountable, plural cleavelandites)