ethiops

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CIDE DICTIONARY

ethiops, n. [NL. See Ethiop.].

A black substance; -- formerly applied to various preparations of a black or very dark color. [1913 Webster]

Ethiops martial (Old Chem.), black oxide of iron. -- Ethiops mineral (Old Chem.), black sulphide of mercury, obtained by triturating mercury with sulphur. -- Ethiops per se (Old Chem.), mercury in finely divided state, having the appearance of a dark powder, obtained by shaking it up or by exposure to the air.