ppd

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Noun

1. {{lb|en|psychiatry}} {{initialism of|en|paranoid personality disorder}}.
2. {{lb|en|psychiatry}} {{initialism of|en|postpartum depression}}.
3. {{lb|en|protein}} {{initialism of|en|purified protein derivative}}.
4. {{lb|en|computing}} {{initialism of|en|pixels per degree|gloss=a measurement of the visual fidelity of a [[w:Virtual reality headset|virtual reality headset]]}}.
5. {{lb|en|astronomy|countable}} [[proplyd]]; {{abbreviation of|en|protoplanetary disc}}.
6. {{senseid|en|Q415024}} {{lb|en|organic compound}} {{initialism of|en|paraphenylenediamine<id:Q415024>}}.
7. {{lb|en|management}} {{init of|en|project product description}}.

Adjective

1. {{abbreviation of|en|postpaid|t=having the cost of postage already paid|id=having postage already paid}}.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.