D defs.my
Entry 2 senses Webster, 1913

Galloper

· Gal·lop·er · IPA
01 n. One who, or that which, gallops.
  1. 1.
    One who, or that which, gallops.
  2. 2.
    A carriage on which very small guns were formerly mounted, the gun resting on the shafts, without a limber.(Mil.)
Phrases & compounds
Galloper gun — a light gun, supported on a galloper, -- formerly attached to British infantry regiments.