What's the difference between harquebus and harquebuse?

Harquebus

Definition:

• (n.) Alt. of Harquebuse

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Harquebuse

Definition:

• (n.) A firearm with match holder, trigger, and tumbler, made in the second half of the 15th century. the barrel was about forty inches long. A form of the harquebus was subsequently called arquebus with matchlock.

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