| 1. | U.S. Navy. a seagoing, amphibious ship capable of carrying and launching assault landing craft from a large, inner compartment that can be flooded, and of making emergency repairs at sea to smaller ships. Origin: l(anding) s(hip) d(eck) ![]() |
| 2. | Pharmacology. a crystalline solid, C20H25N3O, the diethyl amide of lysergic acid, a powerful psychedelic drug that produces temporary hallucinations and a schizophrenic psychotic state. Origin: < G Lysergsäure-Diäthylamid lysergic acid diethylamide ![]() |
| 3. | least significant digit. |
| pounds, shillings, and pence. |

| LSD 2 abbr. least significant digit |
A drug, lysergic acid diethylamide, that produces hallucinations similar to those of a psychosis. Persons on LSD “trips,” which may last for many hours, undergo distortions of their perceptions of space and time and may lose all contact with reality.
LSD
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LSD (ěl'ěs-dē')
n.
Lysergic acid diethylamide; a crystalline compound derived from lysergic acid and used as a powerful hallucinogenic drug. Also called acid, lysergide.
LSD
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