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

• unlimbered
• unlimbering
• unlimbers
• unlime
• unlimed
• unlimes
• unliming
• unlimited
• unlimitedly
• unlimitedness
• unlimitednesses
• violin spider
• violin spiders
• violist
• violists
• violoncellist
• violoncellists
• violoncello
• violoncellos
• violone
• violones
• viols
• VIP
• viper
• Viperidae