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We found 17 dictionaries with English definitions that include the word tachyon:
Click on the first link on a line below to go directly to a page where "tachyon" is defined.

General (13 matching dictionaries)

1. tachyon: Merriam-Webster.com [home, info]
2. tachyon: Oxford Learner's Dictionaries [home, info]
3. tachyon: American Heritage Dictionary of the English Language [home, info]
4. tachyon: Collins English Dictionary [home, info]
5. Tachyon, tachyon: Wordnik [home, info]
6. tachyon: Wiktionary [home, info]
7. tachyon: Webster's New World College Dictionary, 4th Ed. [home, info]
8. tachyon: The Wordsmyth English Dictionary-Thesaurus [home, info]
9. tachyon: Infoplease Dictionary [home, info]
10. tachyon: Dictionary.com [home, info]
11. tachyon: Online Etymology Dictionary [home, info]
12. Tachyon (disambiguation), Tachyon (software), Tachyon: Wikipedia, the Free Encyclopedia [home, info]
13. tachyon: Dictionary/thesaurus [home, info]

Computing (1 matching dictionary)

14. tachyon: Encyclopedia [home, info]

Science (2 matching dictionaries)

15. Tachyon: Eric Weisstein's World of Physics [home, info]
16. Tachyon: Extragalactic Astronomy [home, info]

Slang (1 matching dictionary)

17. Tachyon: Urban Dictionary [home, info]

Quick definitions from Wiktionary (tachyon) ▸ noun:  (physics) A hypothetical particle that travels faster than the speed of light. ▸ noun:  (physics) A flaw in a physical theory that predicts the existence of tachyons or similar paradoxical results. Compare with ghost. ▸ Word origin ▸ Words similar to tachyon ▸ Usage examples for tachyon ▸ Idioms related to tachyon (New!) ▸ Popular adjectives describing tachyon ▸ Words that often appear near tachyon ▸ Rhymes of tachyon ▸ Invented words related to tachyon