ˈkan ə lˌ(y)u̇(ə)r noun
or chan·ne·lure ˈcha-
( -s )
Etymology: French cannelure, alteration of Middle French cannelature, from Old Italian cannellatura, probably from cannella small tube, cinnamon, from Medieval Latin canella — more at canella
1. : a groove running lengthwise on the surface of a cylinder or column
2.
a. : a groove around the cylinder of an elongated bullet for small arms to contain a lubricant
b. : a groove around a bullet into which the edge of the cartridge case is crimped
c. : a groove around the rotating band of a gun projectile to lessen the resistance offered to the rifling
d. : a groove around the base of a cartridge where the extractor takes hold