trocar /trōˈkär/

1. A surgical perforator with a three-sided cutting point used for inserting a cannula, to drain off or introduce liquid, etc
2. Sometimes, a cannula

• a fly in the ointment
• a fly on the wall
• AFM
• a fool's bolt is soon shot
• a fool's errand
• afoot
• a foot in the door
• afore
• aforehand
• aforementioned
• aforesaid
• aforethought
• aforethoughts
• aforetime
• a fortiori
• afoul
• AFP
• AFPC
• Afr
• afraid
• afraid of one's own shadow
• afreet
• afreets
• afresh
• Afric