Definitions
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- noun physics Any
particle withnon-zero mass (i.e. one that travels moreslowly than thespeed of light ).
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
tardy and tachyon
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MRBOGGLE commented on the word tardyon
-noun
a subatomic particle that travels slower than the speed of light.
June 9, 2009