arquebus

As a noun arquebus

is an obsolete matchlock firearm.

As an adjective undefined is

lacking a definition or value.

is likely misspelled.

has no English definition.

As a noun arquebus

is an obsolete matchlock firearm.

As nouns the difference between musket and arquebus

is that musket is a species of firearm formerly carried by the infantry of an army. It was originally fired by means of a match, or matchlock, for which several mechanical appliances (including the flintlock, and finally the percussion lock) were successively substituted. This arm has been superseded by the rifle while arquebus is an obsolete matchlock firearm.

As nouns the difference between arquebuse and arquebus

is that arquebuse is a sort of trigger-based handgun or firearm, by which a burning match was applied, from which the musket was derived while arquebus is an obsolete matchlock firearm.

As nouns the difference between taxonomy and arquebus

is that taxonomy is the science or the technique used to make a classification while arquebus is an obsolete matchlock firearm.