Definition of "LSD"

(Britain, Ireland, dated) Initialism of £sd. (pounds, shillings, pence)  examples

Initialism of lysergic acid diethylamide.  examples

Initialism of Lake Shore Drive (freeway in Chicago).  examples

Initialism of long slow distance (training method of long-distance running).  examples

(geology) Initialism of longshore drift (geological process by which sediments move along a beach shore).

(mechanics) Initialism of limited-slip differential.  examples

(veterinary pathology) Initialism of lumpy skin disease.