Etymology
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l.s.d. 
abbreviation of British currency units, 1853, from first letters of Late Latin librae (see Libra), solidi (see solidus), denarii (see denarius), Roman equivalent of "pounds, shillings, pence." Hence LSDeism "worship of money" (1892).
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denarius (n.)

ancient Roman silver coin, 1570s, from Latin denarius, noun use of adjective meaning "containing ten," and short for denarius nummus "the coin containing ten (aces)," from deni- "by tens," from decem "ten" (from PIE root *dekm- "ten"). In English money reckoning, "a penny," this having been, like the Roman denarius, the largest silver coin (hence d for "pence" in l.s.d.).

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