flywheel

== English == === Etymology === From fly +‎ wheel. === Pronunciation === === Noun === flywheel (plural flywheels) (mechanical engineering) A rotating mass used to maintain the speed of a machine within certain limits while the machine receives or releases energy at a varying rate, or as a form of energy storage. ==== Hypernyms ==== wheel ==== Hyponyms ==== reaction wheel ==== Derived terms ==== fluid flywheel ==== Translations ==== === See also === angular momentum === References === flywheel on Wikipedia.Wikipedia