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

• energising
• energize
• energized
• energizer
• energizers
• energizes
• energizing
• energumen
• energumens
• energy
• energy drink
• energy drinks
• energy gap
• energy gaps
• energy level
• energy levels
• energy-mass equation
• enervate
• enervated
• enervates
• enervating
• enervation
• enervations
• enervative
• enerve