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

A blackish coal-tar colour dye

• focal point
• focal points
• foci
• focimeter
• focimeters
• fo'c'sle
• focus
• focused
• focuses
• focus fund
• focus funds
• focus group
• focus groups
• focusing
• focusing cloth
• focusing cloths
• focusings
• focussed
• focusses
• focussing
• fodder
• foddered
• fodderer
• fodderers
• foddering