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Webster 1913 Edition

Noun.

[L.

margarita

, Gr. [GREEK] a pearl; cf. F.

marguerite

A pearl.

[Obs.]

Peacham.

(Min.)

A mineral related to the micas, but low in silica and yielding brittle folia with pearly luster.

Noun.

A pearl.

Margaric acid.

A mineral of a grayish white color found in Tyrol.

margarite ‎(countable and uncountable, plural margarites)

(mineralogy) A calcium-rich member of the mica group of phyllosilicates, forming white to pinkish or yellowish-gray masses or thin laminae.
(obsolete) pearl