涅石

nièshí
  1. alumen
  2. alunite (TCM)

CEDICT

tcm

Entry Composition

=1 涅 niè
  1. (literary) alunite (formerly used as a black dye)
  2. (literary) to dye black
=1 涅 niè variant of 涅 niè
2 石 shí
  1. rock
  2. stone
  3. stone inscription
  4. one of the eight categories of ancient musical instruments 八音 bāyīn