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Mesolabe

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Mesolabe \Mes"o*labe\, n. [L. mesolabium, Gr. ?; me`sos middle +
   ? to take.]
   An instrument of the ancients for finding two mean
   proportionals between two given lines, required in solving
   the problem of the duplication of the cube. --Brande & C.
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