ffr

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Noun

1. {{lb|en|countable}} {{abbreviation of|en|filtering facepiece respirator}}.
2. {{lb|en|cardiology}} {{abbreviation of|en|fractional flow reserve}}.
3. {{lb|en|ecology}} {{abbreviation of|en|[[free-flowing]] [[river]]}}.

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