(sports, informal) Clipping of synchronized.; Any synchronized event, such as synchronized swimming

(informal) Ellipsis of synchromesh (“from synchro-”).

synchronous; synchronized

plural of synchro

(intransitive) To occur at the same time or with coordinated timing. / (transitive) To cause (video and audio) to play in a coordinated way.

A swimming event where swimmers perform a synchronised routine of dance moves in the water.

synchrotron radiation

(physics) The electromagnetic radiation emitted by the acceleration of relativistic charged particles in a synchrotron or under natural conditions approximating those of a synchrotron.

(physics) A form of cyclotron in which charged particles are accelerated by an electric field that is synchronized with a magnetic field that keeps them in a circular path.

(uncountable) The state of being synchronous or simultaneous. / (Jungian psychology) Coincidences that seem to be meaningfully related; supposedly the result of "universal forces".