1. A small unmanned balloon set aloft to observe atmospheric conditions

Derived forms: meteorological balloons

Type of: balloon

Encyclopedia: Meteorological balloon

• clubbish
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• clubfoot
• clubfooted
• clubhead
• clubhouse
• clubland
• clubmoss family
• clubroom
• clubroot fungus
• cluck
• clucking
• clue
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• clued-up
• clueless
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• clumber spaniel
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• clumsy person