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We found 8 dictionaries with English definitions that include the word round-trip light time: Click on the first link on a line below to go directly to a page where "round-trip light time" is defined. General (8 matching dictionaries) round-trip light time: Vocabulary.com [home, info] round-trip light time: Dictionary.com [home, info] round-trip light time: UltraLingua English Dictionary [home, info] round-trip light time: Rhymezone [home, info] round-trip light time: Free Dictionary [home, info] round-trip light time: Mnemonic Dictionary [home, info] round-trip light time: LookWAYup Translating Dictionary/Thesaurus [home, info] round-trip light time: Dictionary/thesaurus [home, info]

Quick definitions from WordNet (round-trip light time) ▸ noun:  the elapsed time it takes for a signal to travel from Earth to a spacecraft (or other body) and back to the starting point