The Greek letter **λ** (lambda) was derived from the ancient Phoenician letter 𐤋 (lāmed) which meant “goad” (a cattle prod).

The lower-case letter **λ** has many uses in maths, engineering and sciences, including:

- in biology: coliphage λ
- in engineering, mathematics and physics: the wavelength
- in mathematical logic: λ-calculus
- in organic chemistry: lambda convention for non-standard valence states
- in immunology: a type of the immunoglobulin light chain
- in linear algebra: an eigenvalue
- in nuclear physics: the exponential decay constant
- in physics: the linear charge density,
*λ*_{q}

**λ**is also one of the international symbols for LGBT rights.

More photos of letters, numbers and sea glass @ Shutterstock.

Not to forget lambda function i.e. anonymous function.

ReplyDeleteHmmm... but does it actually use the symbol λ (as opposed to the word “lambda”)? I've added the λ-calculus though. Thanks!

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