AaLettersLettersGreek and CopticReviewed 2026-08-08

GREEK SMALL LETTER LAMDA

Greek small letter lambda, used for wavelength and anonymous functions.

U+03BB · 15.1.0 · Greek script

About this character

The Greek small letter lambda (λ) is the eleventh letter of the Greek alphabet, descended from Phoenician lamed. In science, it symbolizes wavelength, radioactive decay constant, and thermal conductivity. In computer science, it denotes anonymous functions, originating from Alonzo Church's lambda calculus and found in languages like Python and Lisp. Its distinctive shape has made it a popular design motif, representing balance or change, and it appears in typography as a mathematical or technical symbol. Historically, the uppercase form was used as a Spartan emblem, while today lowercase lambda remains ubiquitous in equations and code.

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FormatValueAction
UTF-8CE BB
UTF-1603BB
HTMLλ / λ
CSS\0003BB
JavaScript\u03bb
Python\u03bb
URL%CE%BB

Character

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