cut·lass also cut·las 
(kŭtləs)
(kŭtləs)n.
1. A short heavy sword with a curved single-edged blade, once used as a weapon by sailors.
2. Caribbean A machete.
[French coutelas, from Old French coutelasse, probably augmentative of coutel, knife, from Latin cultellus, diminutive of culter, knife; see skel-1 in the Appendix of Indo-European roots.]