1. An organic base C3H4N2; a histamine inhibitor
   - imidazole, glyoxaline

Type of: alkali, base

• Pablo Picasso
• pablum
• pabulum
• PABX
• PAC
• pac-man strategy
• paca
• pace
• pace car
• pace lap
• pacemaker
• pacer
• pacesetter
• pacha
• pachinko
• pachisi
• pachouli
• pachuco
• Pachycephala
• pachycephalosaur
• pachycephalosaurus
• pachycheilia
• pachyderm
• pachyderma
• pachydermal