noun
: a substance painted or drawn on the plate in etching to cause the acid-resistant ground coated over it to break down in water or acid exposing the painted parts to the biting action
noun
: a substance painted or drawn on the plate in etching to cause the acid-resistant ground coated over it to break down in water or acid exposing the painted parts to the biting action
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012