A discharge lamp in which the distance between the electrodes is small (of the order 1 to 10mm).
Note: This type of lamp (mercury or xenon for example) is generally of a high or extra high pressure.
Short-arc lamps are also called Compact-Source Arc Discharge Lamps and are particularly suitable as a light source in optical apparatus for the production of narrow beams.
Reference: C.I.E. (modified)
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
Celsius (previously Centigrade)
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM