Meaning of mind-expander in English:
mind-expander
noun
Something that expands or (apparently) extends the capabilities of the mind; specifically a psychedelic drug.
Pronunciation
mind-expander
/ˈmʌɪndɪkˌspandə/ /ˈmʌɪndɛkˌspandə/Origin
Late 19th century; earliest use found in Popular Science Monthly. From mind + expander, after mind-expanding.
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