ὕσγῐνον · hysginon — LSJ
a vegetable dye of bright crimson or scarlet colour, perh. the kermes (v. ὕσγη), Nic. Th. 511, AP 6.254 (Myrin.); hysginum, Vitr. 7.14.1 (excygno codd.), Plin. HN 9.140, 21.170, 35.45 (hygino, yyg-, yog-, id genus, codd.), Dig. 32.1.78.5, Isid. Etym. 19.17.15 (iscino): gen. sg. ισγινης Edict.Diocl. 19.8; ισγενης, ib. 24.9-12.
scarlet cloak, τὸ ἄλλο ζεῦγος τῶν ὑσγείνων POxy. 531.17 (ii A. D.). [ῑ Nic. and AP ll. cc.; but ὑσγῐνόεις Nic. Th. 870: the forms ισγινη, ισγενη point to a naturally short, ι, lengthd. metri gr.]