focussing

focussing

1. Alternative form of focusing.

   The bacteriologist adjusted the focussing knob on the microscope.

focussing (uncountable)

1. Alternative form of focusing.
   • 1961 February, “Talking of Trains: Collision at Newcastle”, in Trains Illustrated, page 76:

     At the time of the accident, the searchlight signals here were fitted with standard narrow-beam focussing, aimed at a train within 70yd of the signal.

focussing

1. present participle and gerund of focus

Focusing is the more common and often preferred form[1]

• focusings