Kappa (letter)
| Greek letters | |
| Α α Alpha | Β β Beta |
| Γ γ Gamma | Δ δ Delta |
| Ε ε Epsilon | Ϝ ϝ Digamma |
| Ζ ζ Zeta | Η η Eta |
| Θ θ Theta | Ι ι Iota |
| Κ κ Kappa | Λ λ Lambda |
| Μ μ Mu | Ν ν Nu |
| Ξ ξ Xi | Ο ο Omicron |
| Π π Pi | Ϻ ϻ San |
| Ϙ ϙ Qoppa | Ρ ρ Rho |
| Σ σ Sigma | Τ τ Tau |
| Υ υ Upsilon | Φ φ Phi |
| Χ χ Chi | Ψ ψ Psi |
| Ω ω Omega | Ϡ ϡ Sampi |
| Greek alphabet | |
Kappa (upper case Κ, lower case κ) is the 10th letter of the Greek alphabet. In the system of Greek numerals it has a value of 20.
In mathematics, the kappa curve is named after this letter; the tangents of this curve were first calculated by Barrow (17th Century).
The upper-case letter Κ is used as a symbol for:
- In textual criticism, the Byzantine text-type (from Κοινη, Koine, the common text).