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

• proterandry
• proterogynies
• proterogynous
• proterogyny
• Proterozoic
• protervities
• protervity
• protest
• Protestant
• Protestantise
• Protestantised
• Protestantises
• Protestantising
• Protestantism
• Protestantize
• Protestantized
• Protestantizes
• Protestantizing
• Protestants
• Protestant work ethic
• protestation
• protestations
• protested
• protester
• protesters