Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

Comprehensive
Dictionary Suite
Help
Help
Help
 
Advanced Dictionary    
Display options
Show syllables
Show Lookup History
Double-Click Lookup
  Show Spanish support
 
Pronunciation
Wordsmyth
  Phonics
  IPA
 
Entry formats
Standard
  Classic
 
Lookup History
tachyon

tach·y·on

tachyon

pronunciation:
tae ki an
part of speech: noun
definition: a theoretical particle, smaller than an atom, that travels faster than the speed of light.
derivation: tachyonic (adj.)