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ditrihedriaDITRIHEDRIA, n. [Gr., twice three sides.] In mineralogy, a genus of spars with six sides or planes; being formed of tow trigonal pyramids joined base to base, without an intermediate column. |
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ditrihedriaDITRIHEDRIA, n. [Gr., twice three sides.] In mineralogy, a genus of spars with six sides or planes; being formed of tow trigonal pyramids joined base to base, without an intermediate column. |