A wye is used to split a single line [hose or cable] into two lines.

A test flight under heavy ice forming conditions was also made with a Gordon aeroplane fitted with anticers […]

At times, they seemed to be playing an especially orgiastic version of Stick Cricket, all computerised mows over midwicket and 30 off the over.

And then, as I say, in a fit of irritation he committed great-aunticide.