windage

• POS: Noun
• HYPHEN: wind=age

CIDE DICTIONARY

windage, n. [From Wind air in motion.].

•  The difference between the diameter of the bore of a gun and that of the shot fired from it.  [1913 Webster]
•  The sudden compression of the air caused by a projectile in passing close to another body.  [1913 Webster]

OXFORD DICTIONARY

windage, n.
1 the friction of air against the moving part of a machine.
2 a the effect of the wind in deflecting a missile. b an allowance for this.
3 the difference between the diameter of a gun's bore and its projectile, allowing the escape of gas.