Anatocism
From BiblePortal Wikipedia
Webster's Dictionary [1]
(n.) Compound interest.
Cyclopedia of Biblical, Theological and Ecclesiastical Literature [2]
(from Ἀνά , Upon , and Τόκος , Usury ), a term applied to usurious contracts of such a nature that they bound the borrowers to pay interest upon the interest, or compound interest. Such contracts were condemned both by the canon and the civil law.