subreference /subˈ or sub-refˈ(ə-)rəns/

1. An incomplete or surreptitious reference
2. An appeal by a veiled understanding

• blue note
• blue notes
• blue-on-blue
• blue pencil
• blue-pencil
• blue-pencilled
• blue-pencilling
• blue pencils
• blue-pencils
• Blue Peter
• blue pipe-tree
• blue pointer
• blue pointers
• blue poppy
• blueprint
• blueprinted
• blueprinting
• blueprints
• blue quandong
• bluer
• blue riband
• blue ribands
• blue ribbon
• Blue Ribbon Army
• blue ribbons