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The Clue
German physicist of 1800's (7 letter answer)
The Answer
FECHNER
Tags
Notes
The answer FECHNER is so rare that it appears less than once every 2500 puzzles.
Definition
FECHNER as a noun:
1. (Fechner, Gustav Theodor Fechner) = German physicist who founded psychophysics; derived Fechner's law on the basis of early work by E. H. Weber (1801-1887)