Pronunciation: (lē'nis, lā'-), [key]
—adj., n., pl. le•nesPronunciation: (lē'nēz, lā'-). [key] Phonet.
pronounced with relatively weak muscular tension and breath pressure, resulting in weak sound effect: in stressed or unstressed position, (b, d, g, j, v, &thslash;, z, and zh) are lenis in English, as compared with (p, t, k, ch, f, th, s, and sh), which are fortis. Cf. fortis (def. 1).
a lenis consonant.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.