Definition of: tenuis

(ten′y·is) noun plural ·u·es (-y·ēz)
In Greek, one of the three voiceless stops, κ, π, τ, considered in relation to their voiced counterparts, γ, β, δ, or voiceless fricatives, χ, φ, θ; also, corresponding voiceless sounds in other languages, as k, t, p. [<L, thin, trans. of Gk. psilos bare, unaspirated]