slot machine [1]
Electronic or mechanical gambling machine that is operated by inserting a coin into a slot in order to obtain a sequence of winning symbols.
reel 
Cylinder inscribed with symbols that is activated by the machine’s lever; when the three reels stop, the symbols line up to create a combination.
payout tray 
Plate onto which the player’s winnings are dispensed.
winning line 
Display showing the combinations of winning symbols and the winnings to be paid.
coin reject slot 
Small hole into which rejected coins fall.
symbol 
Shape used to create combinations.
lever 
Device connected to the spring linkage to activate the reels.
coin slot 
Opening through which coins are inserted into the machine in order to play.
casing 
Case enclosing and protecting the device’s mechanism.