κ (EN)

letter, symbol

letter “κ”

1. the 10th letter of the Greek alphabet
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   In the Greek word "καλός," the letter "κ" is the first letter.

symbol “κ”

1. (in mathematics) used to represent curvature or other variables
   In geometry class, we learned that the curvature κ of a circle is constant.
2. (in physics) used to represent thermal conductivity
   The engineer calculated the heat flow using the material's thermal conductivity κ.
3. (in statistics) used to represent the kappa coefficient, a measure of agreement between observers
   They reported a κ of 0.85, showing strong consistency between the testers.