U+03B7 "η" Greek Small Letter Eta Unicode Character

U+03B7 "η" Greek Small Letter Eta is the seventh letter of the Greek alphabet, classified as a vowel in ancient Greek where it represented a long e sound, and in modern Greek it is pronounced as a close front unrounded vowel similar to the English "ee" in "see". This character is widely used beyond its alphabetical role, serving as a common symbol in scientific and mathematical contexts, notably denoting viscosity in physics, efficiency in engineering, and a range parameter in statistics and mathematics. It is encoded in Unicode as part of the Greek and Coptic block, standardizing its representation across digital platforms for use in scholarly, technical, and linguistic writing.