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Meaning of semilogarithmic

sem•i•log•a•rith•mic

Pronunciation: (sem"ē-lô"gu-ri'mik, -rith'-, -log"u-, sem"ī-), [key]
— adj. Math.
  1. (of graphing) having one scale logarithmic and the other arithmetic or of uniform gradation.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.