A small or minute particle of color or pigment, or a compound containing chromium in a trivalent state.
From German Chromül, a diminutive of Chrom (chromium), from Greek chroma (color). The -ule suffix indicates something small or a chemical compound.
Scientists use chromule to describe tiny colored particles in chemical reactions, and it's one of those technical words that shows how German chemical terminology became woven into English scientific language during the 19th century industrial revolution.
Complete word intelligence in one call. Free tier — 50 lookups/day.