perfoliate /pər-fōˈli-āt/ (botany)

(of a leaf) having the base joined around the stem, so as to appear pierced by the stem (orig said of the stem passing through the leaf, or of the plant)

• old age
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• old as the hills
• old bachelor
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• Old Bailey
• old bean
• Old Believer
• Old Bill
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• old boot
• old boy
• Old Boy network
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• old campaigner
• Old Catholic
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• old chap
• old-clothesman