indigoid

[ in-di-goid ]
/ ˈɪn dɪˌgɔɪd /

adjective

of or relating to that group of vat dyes that have a molecular structure similar to that of indigo.

noun

an indigoid substance.

Origin of indigoid

First recorded in 1905–10; indig(o) + -oid

British Dictionary definitions for indigoid

indigoid
/ (ˈɪndɪˌɡɔɪd) /

adjective

of, concerned with, or resembling indigo or its blue colour

noun

any of a number of synthetic dyes or pigments related in chemical structure to indigo