Usually means: Hallucinogen persisting perception disorder aftereffects.
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We found 6 dictionaries that define the word HPPD:

General (3 matching dictionaries)
  1. HPPD: Wiktionary
  2. HPPD: Dictionary.com
  3. Hppd: Wikipedia, the Free Encyclopedia

Medicine (1 matching dictionary)
  1. HPPD: Medical dictionary

Miscellaneous (1 matching dictionary)
  1. HPPD: Acronym Finder

Slang (1 matching dictionary)
  1. hppd: Urban Dictionary

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Definitions from Wiktionary (HPPD)

▸ noun:  (clinical psychology) Initialism of hallucinogen persisting perception disorder.

Similar:
HSDD, PTSD, SDPD, MHSDD, StPD, PDD-NOS, posttraumatic stress disorder, post traumatic stress disorder, multiple personality disorder, PDNOS, more...

Opposite:
clear vision

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Similar:
HSDD, PTSD, SDPD, MHSDD, StPD, PDD-NOS, posttraumatic stress disorder, post traumatic stress disorder, multiple personality disorder, PDNOS, more...

Opposite:
clear vision



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