noun
Meaning 1
The range of conditions classified as pervasive developmental disorders, generally held to include classic autism, Asperger's syndrome, pervasive developmental disorder not otherwise specified (PDD-NOS), and childhood disintegrative disorder.
Definition source: English Wiktionary via Wiktextract
Usage: singular, singular-only
Topics: human-sciences, psychology, sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided