trocar /trōˈkär/

1. A surgical perforator with a three-sided cutting point used for inserting a cannula, to drain off or introduce liquid, etc
2. Sometimes, a cannula

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• underrun
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• under-sawyer
• under-sawyers
• undersay
• undersaye
• undersayes
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• underscoring
• underscrub
• underscrubs
• undersea