LSJ
εως, τό, red dye obtained from root of Comarum palustre, PHolm. 14.2, 5, al., Maria ap. Zos.Alch. p. 155 B. ; — also κόμμαρι, εως, τό, PHolm. 13.37, 16.5, al. ; κόμαρις and κώμαρις, ἡ, Anon.Alch. pp. 351, 9 B. ; κόμαρον, τό, ib. p. 350 B., PHolm. 25.15.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)