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

• fish-bellied
• fish-bone
• fish-bones
• fishburger
• fishburgers
• fish cake
• fish cakes
• fish-carver
• fish-carvers
• fish-creel
• fish-creels
• fish-day
• fish-days
• fish-dive
• fish-dives
• fish eagle
• fish eagles
• fish eaters
• fished
• fisher
• fisheries
• fisherman
• fisherman's luck
• fisherman's ring
• fishermen