Webster's Revised Unabridged Dictionary · 1913

Fusileer

Fusileer , noun

[French fusilier, from fusil.]

(a)
(Military) Formerly, a soldier armed with a fusil. Hence, in the plural:
(b)
(Military) A title now borne by some regiments and companies; as, “The Royal Fusiliers,” etc.

Also: Fusilier