in·ci·sor 
(ĭn-sīzər)
(ĭn-sīzər)n.
A tooth adapted for cutting or gnawing, located at the front of the mouth along the apex of the dental arch.
- four-leaf clover
- four-letter word
- four-o'clock
- four-peat
- fourpenny nail
- fourplex
- four-poster
- fourragère
- fourscore
- foursome
- foursquare
- foursquarely
- four-star
- fourteen
- fourteenth
- fourth
- fourth dimension
- fourth estate
- Fourth of July
- fourth quantum number
- fourth wall
- Fourth World
- Fourth-World
- four-way
- four-wheel drive