nigrosine /nigˈrō-sēn or -ro-sin/ or nigrosin /nigˈrō-sin/

A blackish coal-tar colour dye

• Ockhamist
• Ockham's razor
• o'clock
• o'clock for earlier of the clock
• ocotillo
• ocotillos
• OCR
• ocrea
• ocreae
• ocreate
• oct
• oct-
• Oct.
• octa
• octa-
• octachord
• octachordal
• octachords
• octad
• octadic
• octads
• octagon
• octagonal
• octagonally
• octagons