purine /pūrˈin or pūrˈēn/ or purin /pūˈrin/

1. A cyclic double-ring crystalline substance C₅H₄N₄, which with oxygen forms uric acid (C₅H₄N₄O₃), and with many derivatives
2. Any of a number of these derivatives, cyclic diureides, such as adenine and guanine, esp one which is part of the nucleotide chains of DNA and RNA

• tortelli
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• tortes
• tortfeasor
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• torticollis
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• tortile
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• tortility
• tortilla
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• tortillon
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• tortious
• tortiously
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• tortoise
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• tortoise beetles
• thermoduric
• thermodynamic
• thermodynamical
• thermodynamically