Source : Webster's Revised Unabridged Dictionary (1913)

Contemporaneous \Con*tem`po*ra"ne*ous\, a. [L. contemporaneus;
   con- + tempus time. See {Temporal}, and cf.
   {Contemporaneous}.]
   Living, existing, or occurring at the same time;
   contemporary.

         The great age of Jewish philosophy, that of Aben Esra,
         Maimonides, and Kimchi, had been contemporaneous with
         the later Spanish school of Arabic philosophy. --Milman
   -- {Con*tem`po*ra"ne*ous*ness}, n.

Source : WordNet®

contemporaneousness
     n 1: the quality of being current or of the present; "a shopping
          mall would instill a spirit of modernity into this
          village" [syn: {modernity}, {modernness}, {modernism}, {contemporaneity}]
     2: the quality of belonging to the same period of time [syn: {contemporaneity}]