[f. VERMILION sb. + -ETTE.] A substitute for or imitation of the pigment vermilion, the chief constituent of which is eosin or similar dye.
1897. Allbutts Syst. Med., II. 989. Several of the bright red colours used as pigments contain arsenic; for example cochineal red, Persian red, vermilionette, and rosaniline.
1900. Daily News, 3 Aug., 7/5. [He] said defendants had been making vermillionette, without providing a bath.