| Definition | large-scale modification of an entire planet. |
| OED requirements | antedating 1936 |
| Earliest cite | Jack Williamson 'The Cometeers' |
| Comment | Mike Christie submitted a cite from a 1967 reprint of Heinlein's 1950 "Farmer in the Sky". Rick Hauptmann submitted a 1936 cite from Jack Williamson's "The Cometeers". (Earliest cite in the OED: 1951) |
| Last modified | 6 July, 2008 |