sonorant

a voiced sound that is less sonorous than a vowel but more sonorous than a stop or fricative and that may occur as either a sonant or a consonant, as (l, r, m, n, y, w).

a speech sound characterized by relatively free air passage through some channel, as a vowel, semivowel, liquid, or nasal. Compare obstruent.

of, relating to, or having the properties of a sonorant.