Xi (/ zaɪ / ⓘ ZY or / (k) saɪ / (K)SY; [1][2] uppercase Ξ, lowercase ξ; Greek: ξι) is the fourteenth letter of the Greek alphabet, …

Jul 12, 2026 · ξ • (x) (lowercase, uppercase Ξ) Lower-case xi (ξεῖ), the 14th letter of the ancient Greek alphabet. It represented the …

The Greek alphabet has been used to write the Greek language since the late 9th or early 8th century BC. [2][3] It was derived from …

Jul 12, 2026 · Greek Letter Ξ • (X) (uppercase, lowercase ξ) The upper case letter xi (ξι), the 14th letter of the modern Greek alphabet.

Jun 22, 2020 · Listen and learn how to say Xi correctly (Greek letter, value) with Julien, "how do you pronounce" free pronunciation …

Greek alphabet letters & symbols Greek alphabet letters are used as math and science symbols. Greek alphabet list

Xi (ξ) is commonly used to represent random variables in probability theory and statistics because it's visually distinctive and follows …

此外，Ξ高达等科幻作品中也有其文化应用。 衍生书写系统中，ξ演变出西里尔字母Ѯ（Ksi）。 希腊字母体系起源于腓尼基文字，早期 …

Xi or Csi (uppercase Ξ, lowercase ξ) is the 14th letter of the Greek alphabet and it has the value 60 in the Greek number system. In …

Dec 31, 2022 · Simply the Greek letter ξ (xi) in italics (I think). It looks like r is a three-dimensional vector.