lambda

noun

1. 1

   The eleventh letter of the Classical and Modern Greek alphabet, the twelfth of the Old Greek alphabet.

2. 2

   Unit representation of wavelength.

3. 3

   The cosmological constant.

4. 4

   A lambda expression.

5. 5

   The junction of the lambdoid and sagittal sutures of the cranium

6. 6

   A lambda baryon

7. 7

   The percentage change in an option value divided by the percentage change in the underlying asset's price.