bourrelet
noun 3
Definitions
noun
1
An accurately machined portion around the diameter of a shell of a gun, which acts to increase accuracy of projectile fit to the barrel.
The bourrelet is a slightly raised surface on the rocket designed to maintain a light contact with the inside of the launching tube to center the rocket when fired.
2
An escoffion.
3
A raised rim around a footprint consisting of sediment displaced by the pressure of the step.
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