1) Dyestuff 2) Red fabric dye 3) Saffranine 4) Safranin 1) Saffranine 2) Safranin 
• (n.) An orange-red nitrogenous dyestuff produced artificially by oxidizing certain aniline derivatives, and used in dyeing silk and wool; also, any one of the series of which safranine proper is the type.
Also called 'phenosafranine'. A purplish-red, water-soluble dye, C18H14N4, used for textiles and as a stain in microscopy.
Saf'ra·nine noun [ So called because used as a substitute for safranin.] (Chemistry) An orange-red nitrogenous dyestuff produced artificially by oxidizing certain aniline derivatives, and used in dyeing silk and wool; also, any one of the series of which safranine proper is the type. 
safranin noun any of a class of chiefly red organic dyes