1. A pyridine ring with three phosphorus groups

Type of: pyridine

• had better
• Had crime
• hadal
• haddock
• hade
• Hadean
• Hadean aeon
• Hadean eon
• Hadean time
• Hades
• hadith
• hadj
• hadji
• hadn't
• Hadrian
• Hadrian's Wall
• hadron
• hadrosaur
• Hadrosauridae
• hadrosaurus
• hadst
• haecceity
• Haeckel
• haem
• haemagglutinate