ˈfləkshən noun
( -s )
Etymology: Middle French, from Latin fluxion-, fluxio, from fluxus (past participle) + -ion-, -io -ion
1. : the action of flowing
2. : something that flows ; sometimes : continuing motion or change
3. obsolete : an unnatural or excessive flow of blood or fluid toward a body organ
4. obsolete : the derivative of a mathematical function