noun
Usage: often capitalized T&B
: an indamine dye derived from tolylenediamine (sense a) and used as an oxidation-reduction indicator and biological stain
noun
Usage: often capitalized T&B
: an indamine dye derived from tolylenediamine (sense a) and used as an oxidation-reduction indicator and biological stain
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012