noun
xi
zeye
noun
1
A letter of the Greek alphabet (Ξ, ξ), used in math and science to represent variables or particles.
"The equation used xi to represent the unknown angle."
2
A sports team made up of eleven players, especially in football (soccer) or cricket.
"The coach named his starting xi an hour before kickoff."
How to Use Xi
Learner’s notesIn plain EnglishEither the Greek letter xi, or British sporting shorthand for a team of eleven.
UK vs US
"The first xi" (meaning the starting team) is common British sporting terminology, less used in American English.
Word Forms
xis plural, XIs plural, Xis plural
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The equation used _____ to represent the unknown angle.
Etymology
From the Ancient Greek letter name xeî/xî.