PDD

P3D2D2

A form of pervasive developmental disorder — Any of a group of disorders characterized by delays in the development of multiple basic functions including socialization and communication. They were five in the DSM-IV: Asperger syndrome, autism, childhood disintegrative disorder, Rett syndrome, and PDD-NOS.

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Meanings

nounPDD (countable and uncountable, plural PDDs)

plural PDDs

  1. abbreviationcountableinitialismuncountablehuman sciencesInitialism of pervasive developmental disorder.
  2. abbreviationcountableinitialismuncountablehuman sciencesInitialism of persistent depressive disorder.
  3. abbreviationcountableinitialismuncountablemedicineInitialism of photodynamic diagnosis.
  4. abbreviationcountableinitialismuncountablemedicineInitialism of Parkinson's disease dementia.
proper noun
  1. UKabbreviationinitialismgovernmentInitialism of People Demand Democracy.

Synonyms & antonyms

Also see
dysthymiapersistent depressive disorderpervasive developmental disorder
Cite this entry
APA

PDD. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/PDD

MLA

“PDD.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/PDD. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “PDD,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/PDD.

Source: PDD on Wiktionary, CC BY-SA 4.0.