headlamp

From head +‎ lamp.

headlamp (plural headlamps)

1. An individual headlight, particularly of a motor vehicle.
   • 1940, Ralph A. Richardson, Optics and Wheels, General Motors Corporation, p. 13

     The automobile headlamp uses either a parabolic reflector or a slight modification of it to obtain a concentrated light beam.

   • 1942 February, “Notes and News: An Historic American Locomotive”, in Railway Magazine, page 56:

     With its long tapered cowcatcher, massive headlamp and enormous diamond smokestack behind, wagon-top boiler, high running-plate above the driving-wheels reached from a front door in the square side-window cab, cylinders with slide valves mounted on top, and double bogie tender, General in its present form is typical of much earlier American locomotive practice.

2. A flashlight worn on the head.