Clamshell may refer to:

• Bivalve shell, the shell of a clam
• Flip (form), a folding electronic device, also known as a "clamshell"
• Clamshell, a type of blister pack for consumer goods
• Bucket (machine part), or clamshell bucket
• Clamshell Alliance, an anti-nuclear organization
• Clamshell Falls, a waterfall in Australia

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