Etymology of slot by etymonline

a narrow, elongated depression, groove, notch, slit, or aperture, especially a narrow opening for receiving or admitting something, as a coin or a letter · a

a slot through which coins can be inserted into a slot machine

coin303 slot To leave suddenly ; run off II n 1 Any slanting surface or slot ' , 1 slet ; 2 slot I vt 1 To adjust in a slot 2 To cut a

coin slot couloir a slot through which coins can be inserted into a slot machine