What does "tardyon" mean?

Any particle with non-zero mass (i.e. one that travels more slowly than the speed of light).

What is a synonym for "tardyon"?

Common synonyms include: bradyon, bradyon, ittyon, massive particle.

//ˈtɑː.di.ɒn// noun

noun ·Rare ·Advanced level

Noun

1
Any particle with non-zero mass (i.e. one that travels more slowly than the speed of light).
"One, our own, is the tardyon-universe, in which all particles go at subluminal velocities and may accelerate to nearly the speed of light."

"One, our own, is the tardyon-universe, in which all particles go at subluminal velocities and may accelerate to nearly the speed of light."

Blend of tardy + tachyon or tardy + -on.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.