1. A pyridine ring with three phosphorus groups

Type of: pyridine

• forgo
• forgoing
• forgotten
• forint
• fork
• fork out
• fork over
• fork up
• fork-like
• forked
• forked lightning
• forkful
• forking
• forklift
• forklift truck
• forlorn
• forlorn hope
• forlornly
• forlornness
• form
• form bubbles
• form class
• form division
• form family
• form genus