Definition that contains green light
- sidelight light carried by a boat that indicates the boat's direction; vessels at night carry a red light on the port bow and a green light on the starboard bow
- green-blindness dichromacy characterized by a lowered sensitivity to green light resulting in an inability to distinguish green and purplish-red
- daltonism dichromacy characterized by a lowered sensitivity to green light resulting in an inability to distinguish green and purplish-red
- navigation light light on an airplane that indicates the plane's position and orientation; red light on the left (port) wing tip and green light on the right (starboard) wing tip
- deuteranopia dichromacy characterized by a lowered sensitivity to green light resulting in an inability to distinguish green and purplish-red
- running light light carried by a boat that indicates the boat's direction; vessels at night carry a red light on the port bow and a green light on the starboard bow