xi meaning: definition, etymology and quotations

xi

nounalso spelled XI, Xi

/zaɪ/ · /saɪ/

Etymology From Ancient Greek ξεῖ (xeî), ξῖ (xî).

The 14th letter of Classical and Modern Greek. The 15th in Ancient and Old Greek.

Natural sciences, Physical sciences, Physics Particle Either of a pair of hyperons having spin 1/2, which decay into a lambda particle and a pion.

noun

Etymology From translingual XI (“eleven”, Roman numeral).

Ball games, Games, Hobbies, Lifestyle, Soccer, Sports A football (soccer) team of eleven players.

Rewind to the first day of the inaugural Premier League season in August 1992 and 177 players – or 73.1% – featuring in first XIs held English nationality. […] Not since Coventry in 1992 has a Premier League side kicked off a campaign with an all-English XI but things have reached the point where, of the 61 signings who have cost the elite division's 20 clubs a transfer fee this summer, only 12 have involved Englishmen.2013 August 20, Louise Taylor, “English talent gets left behind as Premier League keeps importing”, in The Guardian:

Ball games, Cricket, Games, Hobbies, Lifestyle, Sports A cricket team of eleven players.

noun

Capital Greek letter Ξ (X)

Alternative Alternative form of xi, Greek letter Ξ/ξ (X/x)

Natural sciences, Physical sciences, Physics Alternative Alternative form of xi/Ξ, ellipsis of xi baryon.

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — authors: page histories for xi, XI and Xi.