lightspeed

See also: light speed

English

Alternative forms

• light speed

Etymology

light +‎ speed

Pronunciation

• Audio (US):

  (file)

Noun

lightspeed (countable and uncountable, plural lightspeeds)

1. The speed of light (in vacuum unless another medium is specified)
   • 1994, Ursula K. Le Guin, A Fisherman of the Inland Sea, Victor Gollancz (UK), published 1996, →ISBN, page 7:

     If we're going to a world a hundred light-years from here at near lightspeed, we spend according to our own perceptions, only a few minutes doing so and arrive only a few minutes older.

   • 2005, W. Strawn Douglas, Oracle And Other Stories, page 134:

     He paused, then finished, “with the drive from the Linz, he can do over 500 lightspeeds to meet us.

Translations

the speed of light

• Albanian: shpejtësia e dritës
• Arabic: سُرْعَةْ اَلضَّوْء f (surʕat aḍ-ḍawʔ)
• Breton: tizh al luc'h
• Chinese:

  Mandarin: 光速 (zh) (guāngsù)

• Danish: lysets hastighed (da)
• Dutch: snelheid van het licht f
• Esperanto: lumrapido
• Estonian: valguse kiirus
• Finnish: valonnopeus (fi)
• French: vitesse de la lumière (fr) f
• German: Lichtgeschwindigkeit (de) f
• Greek: ταχύτητα του φωτός f (tachýtita tou fotós)
• Hungarian: fénysebesség (hu)
• Icelandic: ljóshraði (is)
• Italian: velocità della luce f
• (deprecated template usage) {{trans-mid}}
• Japanese: 光速 (ja) (こうそく, kōsoku)
• Korean: 광속 (ko) (gwangsok) (光速 (ko))
• Latin: velocitas luminis f
• Latvian: gaismas ātrums
• Lithuanian: šviesos greitis m
• Macedonian: брзина на светлината f (brzina na svetlinata)
• Persian: سرعت نور (sor'at-e nur)
• Portuguese: velocidade da luz f
• Romanian: viteza luminii f
• Russian: ско́рость све́та f (skórostʹ svéta)
• Spanish: velocidad de la luz (es) f
• Swedish: ljushastighet (sv) c
• Thai: ความเร็วแสง (kwaam-reo-sɛ̌ɛng)
• Turkish: ışık hızı (tr) f
• Vietnamese: tốc độ ánh sáng