A person who is addicted to cocaine or habitually uses cocaine.
From 'cocaine' plus the agent suffix '-ist' (one who practices or uses). This suffix pattern appears in words like 'pianist' (one who plays piano) and 'cyclist'.
The historical term 'cocainist' reveals how differently 19th-century society viewed cocaine addiction—it was often described medically rather than criminally at first, similar to how we now distinguish between addiction and criminal behavior!
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