Definition: "Antilogarithmic" refers to logarithms that are negative. In other words, a logarithm where the base number (usually e) is taken to the power of a negative number. This can be seen in equations like $\ln(-x)$, which is not well-defined because it's taking the base e to a negative exponent - it’s actually undefined for any real number $x$. Antilogarithmic functions are used extensively in physics and mathematics to model certain phenomena, such as radioactive decay. They arise in a variety of contexts including electrical circuits and radioactive decay calculations, where they represent logarithms that are used as exponents or indices. The word "antilogarithmic" is from Greek and comes from the same root "anti" (against) and "logarithm". In essence, antilogarithmic functions are essentially opposites of logarithms.