A narrow groove or fluting, especially on a coin, firearm, or architectural element.
From French 'cannelure,' from Latin 'canalis' (channel). Borrowed into English during the 18th century, used in numismatic and ballistics terminology.
Rifle barrels have 'channelures' called rifling that spin the bullet—this technology from the 1500s made firearms accurate enough to transform warfare, essentially creating the modern military!
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