First attested around 1210 as a surname, and later in the 1400s as a word for the sparrowhawk (Middle English forms: musket, muskett, muskete), from Middle French mousquet, from Old Italian moschetto (a diminutive of mosca, from Latin musca) used to refer initially to a sparrowhawk (given its small size or speckled appearance) adhering to a pattern of naming firearms and cannons after birds of prey and similar creatures (compare falcon, falconet), a sense which was also borrowed into French and then (around 1580) into English. Cognate to Spanish mosquete, Portuguese mosquete. Smoothbore firearms continued to be called muskets even as they switched from using matchlocks to flintlocks to percussion locks, but with the advent of rifled muskets, the word was finally displaced by rifle.
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