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Webster 1913 Edition

Noun.

[Gr.

μείων

smaller. So called in a allusion to the low pyramids of the crystals.]

(Min.)

A member of the scapolite group, occuring in glassy crystals on Monte Somma, near Naples.

Noun.

[Gr. less; from its low pyramids.]pyramidical feldspar, of a grayish white color. It occurs massive and crystallized.

meionite ‎(countable and uncountable, plural meionites)