The Collaborative International Dictionary
Antilogarithmic
Antilogarithm \An`ti*log"a*rithm\, n. (Math.) The number corresponding to a logarithm. The word has been sometimes, though rarely, used to denote the complement of a given logarithm; also the logarithmic cosine corresponding to a given logarithmic sine. -- An`ti*log`a*rith"mic, a.
Wiktionary
antilogarithmic
a. Of or pertaining to an antilogarithm.