| Word | Definition |
|---|---|
| topside adv. (1933) | in or towards the upper parts of a spacecraft; (also) in or towards orbit |
| torch n. (1950) | = torch drive n. |
| torch v. (1956) | to travel in a spaceship using a torch drive |
| torch drive n. (1976) | a fusion-powered, slower-than-light space drive |
| torcher n. (1953) | a pilot of a spaceship with a torch drive |
| torchship n. (1953) | a spaceship that uses a torch drive n. |
| tractor n. (1931) | = tractor beam n. |
| tractor beam n. (1931) | an energy beam that causes the target to be moved or immobilized in space; (also, in early use) a device producing such a beam |
| tractor ray n. (1931) | = tractor beam n. |
| transdimensional adj. (1931) | designating movement between dimensions; involving more than one dimension |
| transgalactic adj. (1936) | across, crossing, or extending across a galaxy |
| transhuman n. (1978) | a person who has gained abilities (as through genetic engineering or cybernetic augmentation) sufficiently advanced that they are regarded as a different species |
| transhuman adj. (1967) | having the qualities or characteristics of transhumans |
| transhumanity n. (1978) | the quality or condition of being transhuman; also, transhumans collectively |
| transmat n. (1952) | = matter transmitter n. |
| transporter n. (1940) | a device for conveying people or things instantaneously from one place to another, esp. a machine which converts matter into energy, individual atoms, information, etc., and transmits it in this form to another location where it is reconstituted; = matter transmitter n. |
| trekker n. (1967) | an admirer of the U.S. television programme Star Trek |
| trekkie n. (1969) | an admirer of the U.S. television programme Star Trek |
| tribble n. (1967) | in the fictional universe of the Star Trek franchise: a species of small, furry, featureless aliens |
| tricorder n. (1966) | in the fictional universe of the Star Trek franchise: a medium-sized hand-held device used for data sensing, analysis, and recording |
| tri-D n. (1950) | a device or system capable of transmitting or displaying a three dimensional image; (also) a three-dimensional image |
| tridee n. (1961) | a device capable of transmitting or displaying a three dimensional image |
| trideo n. (1953) | a device or system capable of transmitting or displaying a (moving) three dimensional image; a (moving) image displayed by such a device |
| tri-di n. (No cites) | see tri-di n. |
| tri-dim n. (1963) | a device or system capable of transmitting or displaying a three dimensional image |
| triffid n. (1951) | in John Wyndhamβs novel The Day of the Triffids: one of a race of malevolent alien plants which threaten to overrun the world |
| triffidian adj. (No cites) | like, or in the manner of a triffid |
| triffid-like adj. (No cites) | like, or in the manner of a triffid |
| tri-v n. (1954) | a device or system capable of recording, transmitting, or displaying a (moving) three dimensional image; such a system as a form of entertainment |
| trivee n. (No cites) | see tri-v n. |
| tri-vid n. (1955) | a device or system capable of transmitting or displaying a three-dimensional image |
| trufan n. (1954) | a science fiction fan who adheres to the ideals and practices of fandom |
| trufandom n. (1954) | the state of being a trufan; excellence in fannish behavior |
| uchronia n. (1976) | = alternate history n. |
| uchronian adj. (1986) | of uchronias |