LSD

1. IrelandUKabbreviationdatedinitialismuncountableInitialism of £sd (pounds, shillings, pence).

   Never pick it out of her. Like getting L. s. d. out of him. Does himself well. No guests. All for number one.

   1922 February 2, James Joyce, “[Episode 8: Laestrygonians]”, in Ulysses, Paris: Shakespeare and Company […], →OCLC, part II [Odyssey], page 145

   1 more example

   ‘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!’

   1865, Charles Dickens, chapter 15, in Our Mutual Friend, London: Chapman & Hall

1. abbreviationuncountablechemistryAbbreviation of lysergic acid diethylamide.

   Microdosing LSD to boost productivity has been all the rage in Silicon Valley for years. I’ve been tempted to try it but I haven’t because LSD is illegal and I’m brown.

   2019 August 5, Arwa Mahdawi, “Self-hypnosis, amphetamines? I tried eight hacks in my quest to be more productive”, in The Guardian, archived from the original on 30 Aug 2019

   Synonyms: acid, Lucy

plural LSDs

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