What is "retrogressed"

Usage examples of "retrogressed".

Could they have already retrogressed, so that now they are returned to an intelligent species?

We didn’t produce a retrogressed antline, nor murder those two men in the crawler.

They needed the Queen to ferry their cargo here, and the ship could not have been handled by a crew who retrogressed as rapidly as the animals it affected.

This thought had not been lost on Dirk as he had performed the Marienbad maneuver, a movement of considerable risk to the perpetrator, and calling for nerves of steel as the ship was retrogressed back along its previous course.

It was a bumpy passage, since the retrogressed course was alive with vast electrical potentials, some of them left by the ship's previous passage, others formed up spontaneously, and all of them colored electric blue.

Sirius V, whose frontiers had retrogressed until it now housed only one vast city.