xi
5 synonyms and 0 antonyms for xi, grouped by meaning and by how common each one is.
Noun — A letter of the Greek alphabet (Ξ, ξ), used in math and science to represent variables or particles.
Synonyms
Everyday swaps
Common words most readers know — safe in any writing.
Less common
Still standard English, but they carry more weight.
Etymology
From the Ancient Greek letter name xeî/xî.
Full origin of xi →Frequently asked questions
What does “xi” mean?
The word “xi” means a letter of the Greek alphabet (Ξ, ξ), used in math and science to represent variables or particles. In plain terms, either the Greek letter xi, or British sporting shorthand for a team of eleven.
How do you pronounce “xi”?
“Xi” is pronounced zeye (/zaɪ/ in IPA).
How do you use “xi” in a sentence?
Here is “xi” used in a sentence: “The equation used xi to represent the unknown angle.”
What part of speech is “xi”?
“Xi” is a noun.
Where does the word “xi” come from?
The word “xi” comes from Ancient Greek. From the Ancient Greek letter name xeî/xî.
Is “xi” a common word?
“Xi” is a fairly common word in modern English.
How many meanings does “xi” have?
“Xi” has 2 distinct senses listed in this dictionary. The most common is: a letter of the Greek alphabet (Ξ, ξ), used in math and science to represent variables or particles.
What is the difference between xi and chi in the Greek alphabet?
Xi and chi are two separate letters of the Greek alphabet. Xi is written Ξ or ξ, while chi is written Χ or χ. They look and sound different, and both are used in maths and science to stand for variables or quantities.
Why is a football or cricket team called an XI?
An XI is a sports team made up of eleven players, especially in football (soccer) and cricket, since each side fields eleven. XI is the Roman numeral for eleven, which is where the name comes from. A club may talk about its 'first XI' as its main team.
Is xi written in capital or lowercase letters?
As the Greek letter, it can be uppercase Ξ or lowercase ξ, depending on what it represents in a formula. As a sports team of eleven, it is usually written as the Roman numeral XI in capitals. The two uses look quite different on the page.