focussing

1. Alternative form offocusing.

   The bacteriologist adjusted thefocussing knob on the microscope.

focussing (uncountable)

1. Alternative form offocusing.
   • 1961 February, “Talking of Trains: Collision at Newcastle”, inTrains Illustrated, page76:

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

focussing

1. presentparticiple andgerund offocus

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

• focusings

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