LDN is contractional slang for the city of

London London is the Capital city, capital and List of urban areas in the United Kingdom, largest city of both England and the United Kingdom, with a population of in . London metropolitan area, Its wider metropolitan area is the largest in Wester ...

in the United Kingdom. LDN may also refer to:

Arts and media

London Daily News The ''London Daily News'' was a short-lived London newspaper owned by Robert Maxwell. It was published from 24 February to 23 July 1987. it was designed to challenge the local dominance of the ''Evening Standard'' in the London market. Despite s ...

, former newspaper *

BBC London BBC London is the BBC English Region producing local radio, television, teletext and online services in London, Surrey and parts of the surrounding areas of the Home Counties. Its output includes the daily '' BBC London'' news bulletin and w ...

(formerly ''BBC LDN''), broadcasting body * "LDN" (song), a 2006 single by Lily Allen

Language

Láadan Láadan () is a gynocentric constructed language created by Suzette Haden Elgin in 1982 to test the Sapir–Whorf hypothesis, specifically to determine if development of a language aimed at expressing the views of women would shape a culture; ...

, a feminist, sci-fi conlang (by ISO 639-3 code)

Medicine

* Licensed Dietitian Nutritionist, a qualified

dietician A dietitian, medical dietitian, or dietician is an expert in identifying and treating disease-related malnutrition and in conducting medical nutrition therapy, for example designing an enteral tube feeding regimen or mitigating the effects of ...

Low-dose naltrexone Low-dose naltrexone (LDN) refers to daily naltrexone dosages that are roughly one-tenth or less of the standard opioid addiction treatment dosage. Most published research suggests a daily dosage of 4.5 mg, but this can vary by a few milligrams. ...

, off-label use for treatment of immune diseases

Science and technology

Day-night average sound level The day-night average sound level (Ldn or DNL) is the average noise level over a 24-hour period. The noise level measurements between the hours of 22:00 and 07:00 are artificially increased by 10 dB before averaging. This noise is weighted to take ...

, Ldn or DNL *

Linked Data Notifications Linked Data Notifications (LDN) is a W3C Recommendation that describes a communications protocol based on HTTP, URI, and RDF on how servers (''receivers'') can receive messages pushed to them by applications (''senders''), as well as how othe ...

, a communications protocol *

Lynds' Catalogue of Dark Nebulae Lynds' Catalogue of Dark Nebulae (abbreviation: LDN) is an astronomical catalogue of dark nebulae. Objects listed in the catalogue are numbered with the prefix LDN (not to be confused with LBN, or Lynds' Catalogue of Bright Nebulae), from numbers ...

, not to be confused with LBN (Lynds' Catalogue of Bright Nebulae)

Transport

* Llandanwg railway station, Gwynedd, Wales (by National Rail station code) {{disambig