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  2. List of Greek letters - Wikipedia

    en.wikipedia.org/wiki/List_of_Greek_letters

    Eta with acute and smooth breathing. Archaic letter denoting the absence of /h/ prior to the vowel, with a high pitch on a short vowel or rising pitch on a long vowel. Ἢἢ. Eta with grave and smooth breathing. Archaic letter denoting the absence of /h/ prior to the vowel, with a normal or low pitch. Ἦἦ.

  3. Greek alphabet - Wikipedia

    en.wikipedia.org/wiki/Greek_alphabet

    This writing system, unrelated to the Greek alphabet, last appeared in the thirteenth century BC. In the late ninth century BC or early eighth century BC, the Greek alphabet emerged. [2] The period between the use of the two writing systems, during which no Greek texts are attested, is known as the Greek Dark Ages.

  4. Xi (letter) - Wikipedia

    en.wikipedia.org/wiki/Xi_(letter)

    Xi (/ zaɪ / ZY or / (k) saɪ / (K)SY; [1][2] uppercase Ξ, lowercase ξ; Greek: ξι) is the fourteenth letter of the Greek alphabet, representing the voiceless consonant cluster [ks]. Its name is pronounced [ksi] in Modern Greek. In the system of Greek numerals, it has a value of 60. Xi was derived from the Phoenician letter samekh .

  5. Greek letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Greek_letters_used_in...

    t. e. Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities. In these contexts, the capital letters and the small letters represent distinct and unrelated entities.

  6. History of Greece - Wikipedia

    en.wikipedia.org/wiki/History_of_Greece

    Generally, the history of Greece is divided into the following periods: Prehistoric Greece: Paleolithic Greece, starting c. 3.3 million years ago and ending in 20,000 BC. Significant geomorphological and climatic changes occurred in the modern Greek area which were definitive for the development of fauna and flora and the survival of Homo ...

  7. Ancient Greek units of measurement - Wikipedia

    en.wikipedia.org/wiki/Ancient_Greek_units_of...

    Ancient Greek units of measurement varied according to location and epoch. Systems of ancient weights and measures evolved as needs changed; Solon and other lawgivers also reformed them en bloc. [citation needed] Some units of measurement were found to be convenient for trade within the Mediterranean region and these units became increasingly ...

  8. Chi Rho - Wikipedia

    en.wikipedia.org/wiki/Chi_Rho

    Chi Rho. The Chi Rho (☧, English pronunciation / ˈkaɪ ˈroʊ /; also known as chrismon[1]) is one of the earliest forms of the Christogram, formed by superimposing the first two (capital) letters— chi and rho (ΧΡ)—of the Greek ΧΡΙΣΤΟΣ (rom: Christos) in such a way that the vertical stroke of the rho intersects the center of the ...

  9. Christian cross variants - Wikipedia

    en.wikipedia.org/wiki/Christian_cross_variants

    A Greek cross with four Cyrillic S's (C) in each of its angles, inspired by the imperial motto of the Palaiologos dynasty, but with the meaning of "Only unity saves the Serbs" (Само Слога Србина Спасава), generally attributed to Serbian patron saint, St. Sava.