Copy ξ, the Greek letter xi, or take the capital Ξ, a math style or the particle string Ξ⁻.
Xi Symbol Copy and Paste
ξGreek small letter xiU+03BEReady to copy
26 xi characters and strings. Tap any value to copy it.
26 xi characters and strings. A character and its name both copy the character. A code copies the code.
Character
Name
Code point
Alt code
HTML
LaTeX
U+03BE. Fourteenth in the Greek alphabet. It writes ks, the sound of x in fox, and often names a random variable. No Alt code types it; HTML has ξ and LaTeX \xi.
U+039E. Capital xi, three level bars. Particle physics marks the xi baryons with it. HTML has Ξ and LaTeX \Xi; no Alt code types it.
U+1D709. Italic small xi for formulas. Plain Greek text keeps U+03BE.
U+1D6EF. Italic capital xi for formulas. Plain Greek text keeps U+039E.
Made of U+03BE, U+0028, U+0073 and U+0029. Xi, then s in parentheses: the Riemann xi function, a variant of the zeta function.
Made of U+039E and U+207B. A xi baryon, a particle made of one down quark and two strange quarks. Xi baryons are also called cascade particles.
Made of U+039E and U+2070. A xi baryon made of one up quark and two strange quarks.
U+2261. Three level bars: the math sign for identical to, also called the triple bar. It is not xi. Alt+240 types it, ≡ in HTML and \equiv in LaTeX.
U+03B6. Zeta, sixth in the alphabet where xi is fourteenth. Both have a tail under the line; they are two letters. ζ in HTML.
U+03A7. Chi, the Greek letter that gave the Latin X its shape. It is a different letter: the one that writes ks is xi.
U+1D6CF. Bold small xi for formulas. Plain Greek text keeps U+03BE.
U+1D743. Bold italic small xi for formulas. Plain Greek text keeps U+03BE.
U+1D77D. Sans-serif bold small xi for formulas. Plain Greek text keeps U+03BE.
U+1D7B7. Sans-serif bold italic small xi for formulas. Plain Greek text keeps U+03BE.
U+1D6B5. Bold capital xi for formulas. Plain Greek text keeps U+039E.
U+1D729. Bold italic capital xi for formulas. Plain Greek text keeps U+039E.
U+1D763. Sans-serif bold capital xi for formulas. Plain Greek text keeps U+039E.
U+1D79D. Sans-serif bold italic capital xi for formulas. Plain Greek text keeps U+039E.
Made of U+03BE and U+03B9. How Greek spells the name xi, said ksee.
Made of U+03BE and U+0374. Xi with the numeral stroke, which Greek calls keraia: the number 60.
U+046E. Ksi, an early Cyrillic letter that was taken from xi. Russian dropped it in 1735.
U+046F. Small Cyrillic ksi.
U+2C9C. Capital ksi of the Coptic alphabet, a script that descends from the Greek one.
U+2C9D. Small Coptic ksi.
U+2630. A sign that Unicode files with the Yijing trigram symbols. Its three whole bars resemble capital xi, and it belongs to no alphabet.
U+0045. The Latin capital E, on every keyboard. Some logos set a capital xi in its place, but xi has no upright stroke.
ξ is the xi symbol: Greek small letter xi, U+03BE, fourteenth in the Greek alphabet and also spelled ksi. The rows add the capital Ξ, math styles such as 𝜉, the strings Ξ⁻ and Ξ⁰, and look-alikes ≡ and ☰.
Read the full guide
Ξ, ≡ and ☰ are three characters
Three level bars can be three things. Ξ, U+039E, is capital xi. ≡, U+2261, is the math sign for identical to, and Alt+240 types it. ☰, U+2630, is a trigram of three unbroken lines. Only the first is a letter, and no Alt code types it.
Xi is the Greek letter for ks
Xi writes the two sounds ks with one letter, as x does in fox. The shape of the Latin X came from a different Greek letter, chi, Χ.
As a Greek numeral xi is 60, written ξʹ.
Ξ⁻ and Ξ⁰ are xi baryons, which physics also calls cascade particles.
Questions and answers
How do I type the xi symbol?
No Alt code types xi, so copying is the short way. In HTML ξ is the small letter and Ξ the capital, ξ and Ξ as numbers. In LaTeX \xi and \Xi print them in math mode.
Is the Greek letter spelled xi or ksi?
Xi is the usual English spelling. Ksi spells the name the way Greek says it, and Unicode uses ksi for the Cyrillic and Coptic letters that came from xi. Greek writes the name ξι.
How do you say xi?
English says zy or ksy, to rhyme with sky. Greek says ksee, in ancient and modern speech alike.
What does the xi letter stand for?
Small ξ often names a random variable, and ξ(s) is the Riemann xi function. Capital Ξ marks the xi baryons of particle physics. In Greek words the letter writes the sound ks.
All 26 xi characters and strings
Start here 10
ΧGreek capital letter chiU+03A7. Chi, the Greek letter that gave the Latin X its shape. It is a different letter: the one that writes ks is xi.
ΞGreek capital letter xiU+039E. Capital xi, three level bars. Particle physics marks the xi baryons with it. HTML has Ξ and LaTeX \Xi; no Alt code types it.
ξGreek small letter xiU+03BE. Fourteenth in the Greek alphabet. It writes ks, the sound of x in fox, and often names a random variable. No Alt code types it; HTML has ξ and LaTeX \xi.
ζGreek small letter zetaU+03B6. Zeta, sixth in the alphabet where xi is fourteenth. Both have a tail under the line; they are two letters. ζ in HTML.
≡Identical toU+2261. Three level bars: the math sign for identical to, also called the triple bar. It is not xi. Alt+240 types it, ≡ in HTML and \equiv in LaTeX.
𝛯Mathematical italic capital xiU+1D6EF. Italic capital xi for formulas. Plain Greek text keeps U+039E.
𝜉Mathematical italic small xiU+1D709. Italic small xi for formulas. Plain Greek text keeps U+03BE.
Ξ⁻Xi minusMade of U+039E and U+207B. A xi baryon, a particle made of one down quark and two strange quarks. Xi baryons are also called cascade particles.
ξ(s)Xi of sMade of U+03BE, U+0028, U+0073 and U+0029. Xi, then s in parentheses: the Riemann xi function, a variant of the zeta function.
Ξ⁰Xi zeroMade of U+039E and U+2070. A xi baryon made of one up quark and two strange quarks.
Show all 26 xi characters and strings (16 more)
Small xi ξ 4
𝝃Mathematical bold italic small xiU+1D743. Bold italic small xi for formulas. Plain Greek text keeps U+03BE.
𝛏Mathematical bold small xiU+1D6CF. Bold small xi for formulas. Plain Greek text keeps U+03BE.
𝞷Mathematical sans-serif bold italic small xiU+1D7B7. Sans-serif bold italic small xi for formulas. Plain Greek text keeps U+03BE.
𝝽Mathematical sans-serif bold small xiU+1D77D. Sans-serif bold small xi for formulas. Plain Greek text keeps U+03BE.
Capital xi Ξ 4
𝚵Mathematical bold capital xiU+1D6B5. Bold capital xi for formulas. Plain Greek text keeps U+039E.
𝜩Mathematical bold italic capital xiU+1D729. Bold italic capital xi for formulas. Plain Greek text keeps U+039E.
𝝣Mathematical sans-serif bold capital xiU+1D763. Sans-serif bold capital xi for formulas. Plain Greek text keeps U+039E.
𝞝Mathematical sans-serif bold italic capital xiU+1D79D. Sans-serif bold italic capital xi for formulas. Plain Greek text keeps U+039E.
Xi in formulas and spelling 2
ξʹXi as a numeralMade of U+03BE and U+0374. Xi with the numeral stroke, which Greek calls keraia: the number 60.
ξιXi in GreekMade of U+03BE and U+03B9. How Greek spells the name xi, said ksee.
Xi in other alphabets 4
ⲜCoptic capital letter ksiU+2C9C. Capital ksi of the Coptic alphabet, a script that descends from the Greek one.
ⲝCoptic small letter ksiU+2C9D. Small Coptic ksi.
ѮCyrillic capital letter ksiU+046E. Ksi, an early Cyrillic letter that was taken from xi. Russian dropped it in 1735.
ѯCyrillic small letter ksiU+046F. Small Cyrillic ksi.
Look-alikes that are not xi 2
ELatin capital letter EU+0045. The Latin capital E, on every keyboard. Some logos set a capital xi in its place, but xi has no upright stroke.
☰Trigram for heavenU+2630. A sign that Unicode files with the Yijing trigram symbols. Its three whole bars resemble capital xi, and it belongs to no alphabet.