Definition of "Phasis"

Poti.* A fortified harbour at the mouth of the river Rion, the ancient Phasis, on the Caucasian coast of the Black Sea. The town is composed of a collection of wooden houses surrounded by a forest.

1868, “Route 20: London to Tiflis […] ”, in Handbook for Travellers in Russia, Poland, and Finland, 2nd edition, London: John Murray, page 320