Mu symbol (μ) — Greek small letter mu. Copy & paste the symbol with one click. Use μ for math, physics, and statistics (population mean). Mu was derived from the Egyptian hieroglyphic symbol for water, which had been simplified by the Phoenicians and named after their word for water, to become (mem). Letters that derive from mu include the Roman M and the Cyrillic М. Usage in Mathematics & Science The lowercase letter mu (μ) is used as a special symbol in many academic fields. Letter [edit] & mu ; • (m) (lowercase, uppercase & Mu ;) Lower-case mu (& mu ;ῦ), the 12th letter of the ancient Greek alphabet. It represented the bilabial nasal /m/. It is preceded by λ and followed by ν. Mu (uppercase/lowercase Μ μ) is a letter of the Greek alphabet used to represent the "m" sound in Ancient and Modern Greek. In the system of Greek numerals, it has a value of 40.
