ap.

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Preposition

1. {{abbreviation of|en|apud|addl=used in scholarly works to cite a reference at second hand}}.

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