The crossword solution for the term 'HUNDREDTH PART OF' is CENTI, which is a prefix meaning one hundredth. It is derived from the Latin word centum, which means one hundred. Centi is commonly used in the metric system to denote a fraction of a unit, such as centimeters or centiliters. In other contexts, it can also be used to refer to a hundredth of a unit, such as a centigram or a centiliter.