phthiocol
/ˈ(f)θʌɪəkɒl/Biochemistry
noun
A yellow crystalline pigment, C11H8O3, originally isolated from tuberculosis bacilli, which has the action of vitamin K; 3-hydroxy-2-methyl-1,4-naphthoquinone.
Origin
1930s. From phthi- + -o- + -col. Compare earlier phthioic.