Order by: alphabetical | chronological
| Word | Definition |
|---|---|
| zap gun n. (1934) | = ray gun n. |
| zero-g n. (1940) | = zero-gravity n. |
| zero-gravity n. (1938) | the state or condition in which there is no apparent force of gravity acting on a body, either because the force is locally weak, or because both the body and its surroundings are freely and equally accelerating under the force |
| zine n. (1941) | = fanzine n. |