Order by: alphabetical | chronological ( asc | desc )
| First date | Word | Definition |
|---|---|---|
| 1900 | aerocar n. (1900) | a small, personal flying vehicle |
| 1900 | anti-gravitational adj. (1900) | acting against gravity |
| 1900 | battleship n. (1900) | a military spaceship having heavy armor and powerful weapons |
| 1900 | boat n. (1900) | = spaceship n. |
| 1900 | cruiser n. (1900) | a spaceship |
| 1900 | earthborn adj. (1900) | originating on the planet Earth, as opposed to outer space or another celestial body |
| 1900 | homeworld n. (1900) | the planet on which an individual being was born; the planet on which a species originated |
| 1900 | Martian n. 2 (1900) | the language of Martians |
| 1900 | midspace n. (1900) | outer space, viewed as an area in its own right |
| 1900 | vessel n. (1900) | a spaceship |
| 1901 | ant-man n. (1901) | an alien being that resembles an ant in humanoid form |
| 1901 | Centaurian adj. (1901) | of or relating to the constellation Centaurus or one of its star systems, esp. Alpha Centauri, or its inhabitants; cf. Alpha Centaurian adj. |
| 1901 | fannish adj. (1901) | of or relating to a dedicated or obsessive fan |
| 1901 | space explorer n. (1901) | one who explores space |
| 1902 | death ray n. (1902) | a destructive beam of energy; a device that generates such a beam |
| 1902 | mind control n. (1902) | the ability to control another personβs thoughts or actions telepathically |
| 1902 | outworld n. (1902) | a planet that is remote from the homeworld or the central planets of a civilization |
| 1904 | time-travelling adj. (1904) | that or who travels through time n. |
| 1905 | ray-proof adj. (1905) | impervious to energy rays, esp. ray weapons |
| 1906 | antigravity n. (1906) | a hypothetical force opposed to that of gravity |
| 1906 | shapechanger n. (1906) | one who can shapechange |
| 1907 | Earthian adj. (1907) | of or pertaining to the Earth or Earthlings |
| 1907 | Earthian n. 1 (1907) | = earthling n. |
| 1907 | Jupiterian adj. (1907) | of or pertaining to the planet Jupiter or its inhabitants |
| 1907 | little green man n. (1907) | a stereotypical inhabitant of outer space; an person of peculiar appearance |
| 1908 | light-century n. (1908) | the distance light travels in 100 years |
| 1908 | lunarscape n. (1908) | a landscape on the moon |
| 1911 | earthgirl n. (1911) | a girl or woman from the planet Earth |
| 1911 | space flyer n. 1 (1911) | a spacecraft |
| 1912 | space sick adj. (1912) | suffering from spacesickness n. |
| 1912 | spacesickness n. (1912) | sickness caused by the effects of space flight |
| 1913 | impossible story n. (1913) | esp. in the early pulp era: a work of imaginative fiction; a different story n. |
| 1913 | Terranian n. (1913) | a native or inhabitant of Earth; = Terran n. 1; also as adj. |
| 1914 | atomic engine n. (1914) | an engine powered by nuclear energy |