What's the difference between flintlock and fusil?

Flintlock

Definition:

• (n.) A lock for a gun or pistol, having a flint fixed in the hammer, which on striking the steel ignites the priming.
• (n.) A hand firearm fitted with a flintlock; esp., the old-fashioned musket of European and other armies.

Example Sentences:

Fusil

Definition:

• (v. t.) Capable of being melted or rendered fluid by heat; fusible.
• (v. t.) Running or flowing, as a liquid.
• (v. t.) Formed by melting and pouring into a mold; cast; founded.
• (n.) A light kind of flintlock musket, formerly in use.
• (n.) A bearing of a rhomboidal figure; -- named from its shape, which resembles that of a spindle.

Example Sentences:

• (1) Side effects, mainly burning and smarting were noted by the investigators in 8 and 11 patients treated by fusilic acid and rifamycin respectively.