(dated) A slideshow, often using an early form of slide projector that could achieve simple animation by moving and merging images.

(historical) An early light projector and precursor to the slide projector that could achieve simple animation by moving and merging images. / (dated) A slide projector.

(nautical) a flight of stairs or a ladder for lowering over the side of a ship for access to and from a small boat.

(ecology) The decline in the overall quality of soil, water or vegetation condition commonly caused by human activities.

A simple lamp that produces and burns acetylene (C₂H₂) created by the reaction of calcium carbide (CaC₂) with water.

A lamp that is a conspicuous feature of Tibetan Buddhist temples and monasteries throughout the Himalayas. The lamps traditionally burn clarified yak butter, but now often use vegetable oil.

A kind of gas-discharge lamp: a clear glass container, often an orb, filled with a mixture of various noble gases at low pressure, and driven by high frequency alternating current at high voltage.

A type of fluorescent lamp (that may or may not contain mercury).

(Britain, informal) Used as a fatuous excuse to avoid doing something.

Unable to move about normally due to illness or injury, especially when confined to bed. / Stored at a dock or other place of safety.