As an initialism PDD
is initialism of pervasive developmental disorder.
As a noun ADHD is
initialism of attention deficit hyperactivity disorder.
pdd
English
See also
* acronym
* Asperger's syndrome
* autism (Autism Spectrum)
* Autism Spectrum (autism)
Anagrams
*
adhd
English
Noun
(-)
See also
* ADHD-C
*
* ADHD-PI
See also
* (Attention-deficit hyperactivity disorder)