synchronous

US /ˈsɪŋ.krə.nəs/
UK /ˈsɪŋ.krə.nəs/
1.

синхронный

existing or occurring at the same time.

:
glaciations were approximately synchronous in both hemispheres
2.

синхронный

(of a satellite or its orbit) 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.