Cutlass
A cutlass is a sword with a curved blade sharpened on the convex side. The cutlass was a sailor's weapon of choice. This curved bladed sword was also used by many foot solders and Mamelukes. Its curve gives it an upper hand in slicing. The cutlass is the sword usually portrayed in films about pirates.
The Cutlass is also a type of automobile built by Oldsmobile.
The cutlass is a type of fish.
The USS Cutlass (SS-478) was a US Navy submarine named after the fish, built during World War II and later used by the Republic of China (on Taiwan).
The Cessna Cutlass is a type of light civilian single-engined aircraft.
The Vought F7U Cutlass is a type of carrier-based aircraft flown by the US Navy.
CUTLASS is the acronym for the Co-operative UK Twin Auroral Sounding System, a research facility using radar used to study the ionosphere. See CUTLASS home page.