The Collaborative International Dictionary
Cannelure
Cannelure \Can"ne*lure\ (k[a^]n"n[-e]*l[-u]r), n. [F., fr. canneler to groove.] (Mil.) A groove in any cylinder; specif., a groove around the cylinder of an elongated bullet for small arms to contain a lubricant, or around the rotating band of a gun projectile to lessen the resistance offered to the rifling. Also, a groove around the base of a cartridge, where the extractor takes hold. -- Can"ne*lured, a.
Wiktionary
cannelure
n. A ringlike groove, such as that around the cylinder of an elongated bullet for small arms to contain a lubricant, or around the rotating band of a gun projectile to lessen the resistance offered to the rifling.
Usage examples of "cannelure".
The tiny cannelures around the bullet are packed with grease to ease its passage through the barrel.