>Terraforming was invented by one of the major SF writers.

If the colonization of other worlds is not to be restricted to those that prove almost-exact duplicates of the Earth, some form of adaptation will be necessary; the colonists might adapt themselves by GENETIC ENGINEERING, as in James Blish's Pantropy series, or cyborgization as in Frederik Pohl's Man Plus, but if they are bolder they might instead adapt the worlds, by terraforming them. The term was coined by Jack Williamson in the series of stories revised as Seetee Ship....

(I have to ask myself whether having such information to hand is worth the space that the humongous Encyclopedia of Science Fiction takes up on my reference shelf....)