D defs.my
Entry 1 sense Webster, 1913

Frankfort black

/frăng'-kfẽrt blăk/ · Frank·fort black · IPA
01 A black pigment used in copperplate printing, prepared by burning vine twigs, the lees of wine, etc.
  1. 1.
    A black pigment used in copperplate printing, prepared by burning vine twigs, the lees of wine, etc.