phi

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Noun

1. {{senseid|en|Q10029}}[[Φ]], the 21st letter of the [[Euclidean alphabet|Euclidean]] and [[Greek alphabet|modern Greek alphabet]], [[usually]] [[romanize]]d as "ph".
2. {{lb|en|mathematics}} The [[golden ratio]].
3. A [[visual]] [[illusion]] [[whereby]] a [[sequential]] [[pattern]] of [[light]]s [[produce]]s a [[false]] [[sense]] of [[motion]].

Proper noun

1. {{label|en|sports}} {{abbreviation of|en|Philadelphia}}.

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