‖ exˈtensumrare—1. [L.; neut. of extensus, pa.pple. of extendĕre to extend.] An extended body; a body possessed of extension. 1678Cudworth Intell.Syst. v. 825 To suppose every Soul to be but one Physical Minimum, or Smallest Extensum, is to imply..an Essential Difference in Matter or Extension.