- 1希臘字母 phi（φ），常見於數學（如黃金比例）
The 21st letter of the Greek alphabet, written Φ or φ. In English, we mostly meet it in math and science, where it stands for special numbers or angles — for example, the 'golden ratio' is often called phi. You'll also see it in the names of university honor societies and fraternities/sororities, like Phi Beta Kappa, because Greek letters are traditionally used for those club names.
From the word’s history
From Late Latin phi, from Ancient Greek φεῖ.
經晚期拉丁文 phi 來自希臘字母 φεῖ。
原始詞典資料5 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
phinoun/faɪ/
- 1
Φ, the 21st letter of the Euclidean and modern Greek alphabet, usually romanized as "ph".
- 2
mathematicssciencesThe golden ratio.
- 3
A visual illusion whereby a sequential pattern of lights produces a false sense of motion.
- […] tolerance (Frenkel-Brunswik 1949) for it showed that those persons with the strongest defences against internal conflict, i.e. obsessionals and conversion hysterics, were those least able to perceive the reality-conflicting phenomenon of phi.
- The illusion of movement in a highway construction sign is an instance of the phi phenomenon, which is also at work in motion pictures and television.
這個拼法也被記錄為下列字的變化形：
- Philadelphia
- protected health information
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。