Recessional a. : Of or pertaining to recession or withdrawal.

Example:
How do I work out Recessional velocity of a galaxy?

Taxonomy
lest we forget, poem, Recessional, Lord God, empire, free encyclopedia, Hosts, the British Empire, Rudyard Kipling, God, dominion, nations rise, Far-called, navies, melt away, dune, headland, fire.

Defination from the web:
Recessional" ...