An alligator clip (also crocodile or spring clip) is a temporary electrical connector, named for its resemblance to an alligator's jaws.

Functioning much like a clothespin, the clip's two tapered, serrated jaws are forced together by a spring to make them grip, and one of the jaws usually has a wire permanently attached for connection to an electrical circuit. The clip may be partly covered by a plastic shroud or "boot" for stress relief or to prevent accidental short-circuits. 

Optional input cable sets for both of Warner's DP-301 and DP-304 differential amplifiers, among other devices, use alligator clips.

Typical alligator clips are shown below.