ethiops
/ˈiːθɪˌɒps/(also aethiops) Chemistry. Now historical
noun
Any of certain typically black or dark-coloured substances made by chemical means; a dark residue or precipitate; especially = ethiops mineral.
- Recorded earliest in ethiops mineral. vegetable ethiops: see the first element..
Origin
Late 17th century; earliest use found in John Pechey (d. 1718). From classical Latin Aethiops inhabitant of Ethiopia, in post-classical Latin also denoting a black substance.