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Pi (/ˈpaɪ/; Ancient Greek /piː/ or /peî/, uppercase Π, lowercase π, cursive ϖ; Greek: πι) is the sixteenth letter of the Greek alphabet, representing the voiceless bilabial plosive IPA:. In the system of Greek numerals it has a value of 80. It was derived from the Phoenician letter Pe ().
This is a list of letters of the Greek alphabet. The definition of a Greek letter for this list is a character encoded in the Unicode standard that a has script property of "Greek" and the general category of "Letter". An overview of the distribution of Greek letters is given in Greek script in Unicode.
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 the earlier Phoenician alphabet, [4] and is the earliest known alphabetic script to have developed distinct letters for consonants as well as vowels. [5]
Π π : Greek letter Pi. 𐌐 : Old Italic and Old Latin P, which derives from Greek Pi, and is the ancestor of modern Latin P. The Roman P had this form (𐌐) on coins and inscriptions until the reign of Claudius, c. 50 AD. 𐍀 : Gothic letter pertra/pairþa, which derives from Greek Pi; П п : Cyrillic letter Pe, which derives from Greek Pi
The history of the Greek alphabet starts with the adoption of Phoenician letter forms in the 9th–8th centuries BC during early Archaic Greece and continues to the present day.
In addition, the red alphabet also introduced letters for the aspirates, Φ = /pʰ/ and Ψ = /kʰ/. Note that the use of Χ in the "red" set corresponds to the letter "X" in Latin, while it differs from the later standard Greek alphabet, where Χ stands for /kʰ/, and Ψ stands for /ps/. Only Φ for /pʰ/ is common to all non-green alphabets.
Greek letters are frequently used for scientific and symbolic purposes. This category is intended as a list of the Greek letters; details on their usage can be found in their individual articles. This category is intended as a list of the Greek letters; details on their usage can be found in their individual articles.
The following is a Unicode collation algorithm list of Greek characters and those Greek-derived characters that are sorted alongside them. [2] [3] [4]Most of the characters of the blocks listed above are included, except for the Ancient Greek Numbers, Ancient Symbols and Ancient Greek Musical Notation.