LRN may refer to:
*
Laboratory Response Network, a collaborative effort of the U.S. Centers for Disease Control and Prevention and the Association of Public Health Laboratories
* ''
Land Rights News'', the longest-running Aboriginal Australian newspaper, published by the Central and Northern Land Councils
*
Lateral reticular nucleus
The lateral reticular nucleus, of the lateral funiculus, can be divided into three subnuclei, the parvocellular, magnocellular and the ''subtrigeminal''. As is typical of the reticular formation, none of these are very distinct subnuclei, but rat ...
, a nucleus of the medulla oblongata involved with co-ordinating baroreceptor signals to control arterial blood pressure
* Lead round nose, a type of
bullet
A bullet is a kinetic projectile, a component of firearm ammunition that is shot from a gun barrel. They are made of a variety of materials, such as copper, lead, steel, polymer, rubber and even wax; and are made in various shapes and constru ...
*
Legislative route number, a designation for a highway defined by laws passed in a state legislature
*
Location Routing Number, a ten digit phone number used to route phone calls between two telephone exchanges
*
LORAN
LORAN (Long Range Navigation) was a hyperbolic navigation, hyperbolic radio navigation system developed in the United States during World War II. It was similar to the UK's Gee (navigation), Gee system but operated at lower frequencies in order ...
, a terrestrial radio navigation system originally known as LRN for Loomis Radio Navigation
*
LRN (company)
LRN, founded in 1994, is an American company which provides advising and educating on ethics, regulatory compliance, and corporate culture to other organizations. When founded, the company focused on the legal industry and was named Legal Researc ...
, an ethics compliance and education company
*
Luminous red nova
A luminous red nova (abbr. ''LRN'', pl. ''luminous red novae'', pl.abbr. ''LRNe'') is a stellar explosion thought to be caused by the merging of two stars. They are characterised by a distinct red colour, and a light curve that fades slowly with ...
, a stellar explosion thought to be caused by the merger of two stars
{{disambiguation