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

• arbovirus
• arboviruses
• Arbroath smokie
• arbs
• arbute
• arbutes
• arbutus
• arbutuses
• arc
• ARC
• arcade
• arcaded
• arcades
• Arcadian
• Arcadianism
• arcading
• arcadings
• Arcady
• arcana
• arcane
• arcanely
• arcaneness
• arcanenesses
• arcanist
• arcanists