Merriam-Webster Collegiate Dictionary - centrifugal

 I. adjective  Etymology: New Latin centrifugus, from centr- + Latin fugere to flee — more at fugitive  Date: circa 1721  1. proceeding or acting in a direction away from a center or axis  2. using or acting by ~ force a ~ pump  3. efferent  4. tending away from centralization ; separatist ~ tendencies in modern society  • ~ly adverb  II. noun  Date: 1866 a ~ machine or a drum in such a machine