Historical Dictionary of Science Fiction

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Word Definition
laser gun n. (1963) a weapon that fires a laser
laser pistol n. (1963) a hand weapon of similar size to a pistol that fires a laser
laser rifle n. (1963) a long shoulder weapon that fires a laser
launching laser n. (1971) a high-powered laser used for the launching of spacecraft, either by vaporizing propellant at the rear of the craft, or by radiation pressure on a solar sail n.
Law of Robotics n. (1944) in the writing of Isaac Asimov: each of three (later sometimes four) rules devised to govern the behaviour of robots
letterhack n. (1942) a fan who frequently writes letters to magazine or fanzine letter columns
lifeboat n. (1907) a small spacecraft designed for escaping from a damaged spaceship or space station; cf. lifeship n.; escape ship n.
lifeship n. (1930) an emergency spacecraft; lifeboat n.
life tube n. (1930) an escape pod having a cylindrical shape; cf. lifeboat n.
light n. 1 (1934) = lightspeed, used as a unit of measure; cf. light-speed n. 2
light n. 2 (1961) a light year
light barrier n. 1 (1930) a force field made of beams of light
light barrier n. 2 (1950) the speed of light, as a theoretical limit of speed of any object
light-century n. (1908) the distance light travels in 100 years
light-day n. (1933) the distance light travels in 24 hours
light-hour n. (1920) the distance light travels in one hour
light-minute n. (1945) the distance light travels in one minute
light-month n. (1933) the distance light travels in one month
lightsaber n. (1975) in the fictional universe of the Star Wars franchise: a weapon resembling a sword, but having a destructive beam of light in place of a blade
light sail n. (1963) = solar sail n.
light-second n. (1915) the distance light travels in one second
lightspeed n. 1 (1856) the speed of light
light-speed n. 2 (1932) a unit of measure equal to the speed of light; cf. light n. 1
light-week n. (1934) the distance light travels in one week
light-year n. (1868) the distance light travels in one year
little green man n. (1907) a stereotypical inhabitant of outer space; an person of peculiar appearance
loc n. (1961) a letter written to a magazine, esp. a fanzine
loc v. (1962) to write a loc (to)
Loonie n. (1941) a native or inhabitant of the Moon; = Lunarian n.; Lunite n.; Lunarite n.
Lovecraftian adj. (1927) of, relating to, or characteristic of the writing of H. P. Lovecraft, esp. in featuring elements of supernatural and often existential horror
lox n. (1965) plural of loc
Luna n. (1931) the Moon
Luna City n. (1934) the main city on the Moon
Lunarian n. (1708) a native or inhabitant of the Moon
Lunarian adj. (1813) of or characteristic of the Moon