n. 1 the sixteenth letter of the Greek alphabet. 2 (as π.) the symbol of the ratio of the circumference of a circle to its diameter (approx. 3.14159). pi-meson = PION.
[ Gk: sense 2 f. Gk periphereia circumference ]
n. 1 the sixteenth letter of the Greek alphabet. 2 (as π.) the symbol of the ratio of the circumference of a circle to its diameter (approx. 3.14159). pi-meson = PION.
[ Gk: sense 2 f. Gk periphereia circumference ]
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012