Cadmean

a.
  1. Of or pertaining to Cadmus, a fabulous prince of Thebes, who was said to have introduced into Greece the sixteen simple letters of the alphabet -- α, β, γ, δ, ε, ι, κ, λ, μ, ν, ο, π, ρ, σ, τ, υ. These are called Cadmean letters.
  2. Cadmean victory ,
    a victory that damages the victors as much as the vanquished; probably referring to the battle in which the soldiers who sprang from the dragon's teeth sown by Cadmus slew each other. Similar to a Pyhrric victory.