נוּךְ, (נָכָה) diminution, lesser portion. Sifra M’tsorʿa, Neg., Par. 3, ch. III (expl. תְּנוּךְ, Lev. XIV, 14) תוך נ׳ וכ׳ inside of the lesser helix, which is the anti-helix, v. גְּדֵירָא.