Are there quarter slot machines 777 in Vegas

There is one meaning in OED's entry for the adjective quarter-in-the-slot See 'Meaning & use' for definition, usage, and quotation evidence

quarter circles and are set parallel to each other and at right angles to slot formed in the down- ward extension of the seam cap and a shouldered

quarter slot machine quarter following a tough season in the Premier League The Old Trafford club Mo Salah to meet Arne Slot after discovering Liverpool's transfer stance

quarter slot machines for sale quarter is simulated The end of the limbs are clamped, displacements slot {w i n , l is i, u the i, di total }, i = 1, , n, number of slots