Unknown particle Synonyms

Unknown replaced

original particle

Definitions for Unknown

(adjective) happening or existing without one's knowledge
(adjective) not known or experienced before
(adjective) not widely known

Synonyms for phrase

UP abbreviation

UP is an abbreviation for Unknown Particle

What does UP stand for?

UP stands for "Unknown Particle"

Particle replaced

unknown fraction

unknown piece

Definitions for Particle

(noun) a very small amount
(noun) a very small piece
(noun) (nontechnical usage ) a tiny piece of anything