is slot

a long, narrow hole, especially one for putting coins into or for fitting a separate piece into: I put my money in the slot and pressed the button but nothing came out. mega wheel slot The holder has slots for 100 CDs. slot 5d Synonyms breach (OPENING) formal chink (CRACK) cleft crack (NARROW SPACE) cranny crevice fissure gap (HOLE) interstice formal opening (HOLE) slit