| Definition | pertaining to that part of an astronomical body facing away from the Sun. |
| OED requirements | any evidence 1935 |
| Earliest cite | Stanley G. Weinbaum, The Lotus Eaters |
| Comment | Fred Galvin submitted a cite from a 1959 reprint of Stanley G. Weinbaum's "The Lotus Eaters", which Mike Christie verified in we the original publication (Astounding Stories, April 1935) We would like to see further cites of any date. |
| Last modified | 10 December, 2009 |