What is the meaning of Pion?

Any of three semistable mesons, having positive, negative or neutral charge, composed of up and down quarks/antiquarks.

pawn; least valuable piece in chess

a pawn; a person who has no control over their lot, usually manipulated by others to some end

pawn

piece, pawn (generic player piece in boardgames resembling the pawn in chess)

pawn (someone without control; one who is (easily) manipulated)

pion (subatomic particle)

accusative singular of pio

pawn

pawn

counter

supervisor (in a school)

pion

pawn

pion

pioneer

The pawn piece in chess.

A pion.

alternative form of peon

alternative form of peon

a pion

pawn

the vertical

plumb line

section; department

duct; riser; any installations or spaces running vertically in a building

flats in an apartment block sharing those installations

pawn

pion

genitive plural of piona

pawn

peony; a flower

pion; any of the semistable π-mesons

Source: wiktionary.org