polianite /pōˈli-ə-nīt/

A steel-grey mineral, manganese dioxide

• yellow jack
• yellow jacket
• yellow jackets
• yellow jacks
• yellow jersey
• yellow jerseys
• yellowlegs
• yellow line
• yellow lines
• yellow metal
• yellow metals
• yellowness
• yellownesses
• yellow ox-eye
• Yellow Pages®
• yellow pepper
• yellow peril
• yellow perils
• yellow pimpernel
• yellow poplar
• yellow poplars
• yellow press
• yellow presses
• yellow rattle
• yellow ribbon