boffin /bofˈin/ (orig milit sl)

1. A research scientist, esp one employed by the armed forces or government
2. Any expert or intellectual

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• Blue Peter
• blue pipe-tree
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• blue pointers
• blue poppy
• blueprint
• blueprinted
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• blueprints
• blue quandong
• bluer
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• Blue Ribbon Army
• blue ribbons
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• blue-rinse
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• blue rocket
• blue-rot
• blue-rots