synchronous

 
Pronunciation: /ˈsɪŋkrənəs/

adjective

  • 1existing or occurring at the same time: glaciations were approximately synchronous in both hemispheres
  • 2 Astronomy making or denoting an orbit around the earth or another celestial body in which one revolution is completed in the period taken for the body to rotate about its axis.

Derivatives

synchronously

adverb

Origin:

mid 17th century: from late Latin synchronus (from Greek sunkhronos, from sun- 'together' + khronos 'time') + -ous