Analog stick

From Styleguide

analog stick

Any joystick that translates user input as an analog value rather than a digital value.

Analog sticks allow for slight gradations in input force and direction, while digital joysticks can only register preset directions as on or off.

Analog joystick acceptable on all references. Do not use analog stick to refer to the controller as a whole. Note that not all joysticks are analog.

Example: The Nintendo 64 was the first system to have an analog stick on its controller. Players can tilt the analog stick forward slightly to make Mario tiptoe past the piranha plants.

Also see: analog, controller, joystick.