μελαντηρία
From LSJ
μὴ ἐν πολλοῖς ὀλίγα λέγε, ἀλλ΄ ἐν ὀλίγοις πολλά → don't say little in many words, but much in a few words (Stobaeus quoting Pythagoras)
English (LSJ)
ἡ,
A black pigment, also used internally as a drug, Lat. creta sutoria, shoemakers' black, IG22.1672.14,16,69, Arist.Col.794a20, Heraclid.Tar. ap. Cael.Aur.CP3.44, Dsc. 5.101, Gal. 13.741, Luc.Cat.15, Scrib.Larg.208.