Order by: alphabetical | chronological ( asc | desc )
| First date | Word | Definition |
|---|---|---|
| 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 |
| 1902 | space journey n. (1902) | a journey in space |
| 1904 | time-travelling adj. (1904) | that or who travels through time n. |
| 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 | 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 |
| 1914 | dayside n. (1914) | the side of a planet that is in daylight, sometimes in the context of a planet with one side permanently facing its sun |
| 1914 | imaginative adj. (1914) | denoting a genre of literature, etc. that is not realistic or mimetic; science fiction, fantasy, and horror collectively |
| 1914 | lightspeed n. 1 (1914) | the speed of light |
| 1914 | nightside n. (1914) | that part of an astronomical body facing away from the nearest star; cf. darkside n. 1, farside n. |
| 1914 | time travel n. (1914) | the activity of travelling into the past or future; hypothetical movement through time n. |
| 1914 | Wellsian n. (1914) | a devotee or follower of H. G. Wells |
| 1915 | light-second n. (1915) | the distance light travels in one second |
| 1916 | posthuman adj. (1916) | of or relating to a hypothetical species that might evolve from human beings, as by means of genetic or bionic augmentation; cf. posthuman n. |
| 1916 | scientifiction n. (1916) | = science fiction n. |
| 1917 | energy gun n. (1917) | a weapon firing a beam of energy n.; = ray gun n. |