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Also known as lambda, lamda

Lambda (; uppercase ', lowercase ; , ; , ), sometimes rendered lamda, labda or lamma', is the eleventh letter of the Greek alphabet, representing the voiced alveolar lateral approximant ; it derives from the Phoenician letter Lamed, and gave rise to Latin L and Cyrillic El (). In the system of Greek numerals, lambda has a value of 30. The ancient grammarians typically called it (, ) in Classical Greek times, whereas in Modern Greek it is (, ), while the spelling () was used (to varying degrees) throughout the lengthy transition between the two.