LSD

Borrowed from Latin lībra solidus dēnārius.

LSD (uncountable)

1. (British, Ireland, dated) Initialism of £sd (pounds, shillings, pence).
   • 1865, Charles Dickens, chapter 15, in Our Mutual Friend, London: Chapman & Hall:

     ‘Now, mark this chap’s saying Miss Wilfer, when he means L.s.d.!’ cried Mr Boffin, with a cunning wink. ‘Now, mark this chap’s making Miss Wilfer stand for Pounds, Shillings, and Pence!’

From German LSD, initialism of Lysergsäure-diethylamid.

LSD (uncountable)

2. (organic chemistry) Abbreviation of lysergic acid diethylamide.

   Synonyms: (slang) acid, (slang) Lucy; see also Thesaurus:LSD

• 1V-LSD

Other initialisms.

LSD (countable and uncountable, plural LSDs)

1. Initialism of Lake Shore Drive (freeway in Chicago).
2. Initialism of long slow distance (training method of long-distance running).
3. (geology) Initialism of longshore drift (geological process by which sediments move along a beach shore).
4. (mechanics) Initialism of limited-slip differential.
5. (veterinary pathology) Initialism of lumpy skin disease.

• D/Ls, DLS, DLs, DSL, LDS, LDs, SDL, SLD, d/ls, dls

Borrowed from German LSD, initialism of Lysergsäure-diethylamid.

• IPA^(key): /ɛl.ɛs.de/

LSD m (uncountable)

1. LSD (lysergic acid diethylamide)

• dsl

• Audio (Germany (Berlin)):

  (file)

LSD n (strong, genitive LSDs, no plural)

1. initialism of Lysergsäure-diethylamid; LSD

• “LSD”, in Digitales Wörterbuch der deutschen Sprache‎^[1] (in German)

From German LSD, initialism of Lysergsäure-diethylamid.

• IPA^(key): [ˈɛlɛʒdeː] (phonetic respelling: elesdé)
• Hyphenation: LSD
• Rhymes: -deː

LSD (plural LSD-k)

1. (organic chemistry) LSD (lysergic acid diethylamide)

   Synonym: lizergsav-dietilamid

Unadapted borrowing from German LSD, initialism of Lysergsäure-diethylamid.

• IPA^(key): /ɛl.ɛzˈdi/, /ɛl.ɛzˈdɛ/

• Audio:

  (file)

• Rhymes: -i, -ɛ
• Syllabification: L‧S‧D

LSD n (indeclinable)

1. (organic chemistry) LSD, lysergic acid diethylamide (powerful synthetic hallucinogen)

   Synonym: kwas

• “LSD”, in Wielki słownik języka polskiego‎^[2] (in Polish), Instytut Języka Polskiego PAN
• “LSD”, in Polish dictionaries at PWN‎^[3] (in Polish)
• LSD in PWN's encyclopedia

Orthographic borrowing from German LSD, initialism of Lysergsäure-diethylamid.

LSD m (uncountable)

1. LSD (lysergic acid diethylamide)

• “LSD”, in Dicionário Aulete Digital (in Portuguese), Rio de Janeiro: Lexikon Editora Digital, 2008–2026
• “LSD”, in Dicionário Priberam da Língua Portuguesa (in Portuguese), Lisbon: Priberam, 2008–2026

Borrowed from German LSD, initialism of Lysergsäure-diethylamid.

• IPA^(key): [e.les.de]

LSD

1. LSD (lysergic acid diethylamide)

   Synonym: acid lisergic dietilamida-25

• IPA^(key): /elˈesde/ [elˈez.ð̞e]
• Rhymes: -esde

LSD m (plural LSDs)

1. LSD (drug)

• “LSD”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8.1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025

LSD c

1. LSD (psychedelic drug)

   Synonym: (slang) syra

• “LSD”, in Svensk ordbok [Dictionary of Swedish] (in Swedish)
• Svensk MeSH