1. A long lasting layer of ice covering a large area

Derived forms: ice sheets

Encyclopedia: Ice sheet

• 4-hitter
• 4-membered
• 40
• 400
• 400th
• 401-k
• 401-k plan
• 40th
• 41
• 41st
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• 42nd
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• 43rd
• 44
• 440 yards
• 44th
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• 48th