Source : Webster's Revised Unabridged Dictionary (1913)

Cotemporaneous \Co*tem`po*ra"ne*ous\ (k?-t?m`p?-r?"n?-?s), a.
   [See {Contemporaneous}.]
   Living or being at the same time; contemporaneous. --
   {Co*tem`po*ra"ne*ous*ly}, adv. -- {Co*tem`po*ra"ne*ous*ness},
   n.