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

• trophallactic
• trophallaxes
• trophallaxis
• trophesial
• trophesies
• trophesy
• trophi
• trophic
• trophic level
• trophic structure
• trophied
• trophies
• tropho-
• trophobioses
• trophobiosis
• trophobiotic
• trophoblast
• trophoblastic
• trophoblasts
• trophologies
• trophology
• trophoneuroses
• trophoneurosis
• Trophonian
• trophoplasm