Meaning

noun a muzzle-loading shoulder gun with a long barrel; formerly used by infantrymen

originFirst attested around 1210 as a surname, and later in the 1400s as a word for the sparrowhawk (Middle English forms: musket, muskett, muskete (“sparrow hawk”)), from Middle French mousquet, from Old Italian moschetto (a diminutive of mosca (“fly”), from Latin musca) used to refer initially to a sparrowhawk (given its small size or speckled appearance) and then a crossbow arrow. The name was…

Etymology from Wiktionary, CC BY-SA 3.0