also: クシー · グザイ
noun
xi
The 14th letter of the Greek alphabet, used in mathematics, physics, and other sciences.
物理学では、Ξはしばしば粒子の名前として使われる。
In physics, Ξ is often used as the name of a particle.
数学の方程式にξが現れた。
The letter ξ appeared in the mathematical equation.
Alternate katakana spelling reflecting the English pronunciation.
Rare katakana spelling; may be encountered in older or specialized texts.
From Greek ξῖ (xi), the 14th letter of the Greek alphabet.