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

• stretching
• stretching-bond
• stretching course
• stretching courses
• stretching frame
• stretching frames
• stretching iron
• stretching irons
• stretchless
• stretch limo
• stretch limos
• stretch limousine
• stretch marks
• stretch one's legs
• stretch one's wings
• stretchy
• stretta
• strette
• stretti
• stretto
• streusel
• streusels
• strew
• strewage
• strewages