Order by: alphabetical | chronological ( asc | desc )
| First date | Word | Definition |
|---|---|---|
| 1872 | Venusian adj. (1872) | of, pertaining to, or characteristic of the planet Venus or its inhabitants |
| 1871 | aircar n. (1871) | = aerocar n. |
| 1871 | earth people n. (1871) | natives or inhabitants of Earth; cf. earth person n. |
| 1871 | Terra n. (1871) | the planet Earth |
| 1870 | meteor storm n. (1870) | a particularly intense meteor shower, esp. occurring when the earth intercepts a meteor stream soon after the originating comet has passed; an intense encounter with a stream of meteors in space |
| 1870 | Neptunian n. 1 (1870) | a native or inhabitant of the planet Neptune |
| 1869 | Jovian n. 1 (1869) | a native or inhabitant of the planet Jupiter |
| 1868 | areography n. (1868) | the study or mapping of the planet Mars |
| 1868 | dystopian n. (1868) | one who advocates or describes a dystopia n. 2 |
| 1868 | light-year n. (1868) | the distance light travels in one year |
| 1868 | Martian n. 1 (1868) | a native or inhabitant of the planet Mars; cf. earlier Marsian n. 1 |
| 1867 | asteroid belt n. (1867) | the toroidal region of space around a star in which most asteroid orbits occur |
| 1866 | time n. (1866) | time viewed as a medium through which travel into the past or future is hypothesized or imagined to be possible |
| 1864 | shapechanging n. (1864) | the act of or ability to shapechange |
| 1861 | Earthian n. 1 (1861) | a native or inhabitant of Earth; = earthling n. |
| 1858 | earthling n. (1858) | a native or inhabitant of Earth |
| 1858 | Planet Earth n. (1858) | (without the), the earth, as distinct from the rest of the universe, esp. when considered as the planet on which humans live, or on which living organisms form an ecological system; the whole world |
| 1856 | lightspeed n. 1 (1856) | the speed of light |
| 1855 | Jupiterian n. (1855) | a native or inhabitant of the planet Jupiter |
| 1854 | extraterrestrial adj. (1854) | existing or originating outside the earth or its atmosphere |
| 1853 | Marsian n. 1 (1853) | a native or inhabitant of the planet Mars; = Martian n. 1 |
| 1849 | earthman n. (1849) | a person (esp. a man) who is a native or inhabitant of the planet Earth |
| 1849 | Neptunian adj. (1849) | of or relating to the the planet Neptune or its inhabitants |
| 1842 | outer space n. (1842) | the region of space beyond Earthβs atmosphere or beyond the solar system; in extended use: a place or region beyond the usual limits of awareness or accessibility |
| 1841 | worldlet n. (1841) | a small celestial object; a planetoid |
| 1834 | Sirian n. 1 (1834) | a native or inhabitant of the Sirius system |
| 1834 | Solarian n. 1 (1834) | a native or inhabitant of Sol n. |
| 1834 | Uranian n. (1834) | a native or inhabitant of Uranus |
| 1828 | Tellurian n. (1828) | a native or inhabitant of Earth |