sinus

(Tiếng Anh)

1. (declension-4, masculine, poetic) a bent surface; a curve, fold, hollow
2. (declension-4, masculine) the hanging fold of a toga over the breast; a pocket, lap
3. (declension-4, masculine, poetic) the hanging fold of a toga over the breast; a pocket, lap
4. (declension-4, masculine) the hanging fold of a toga over the breast; a pocket, lap
5. (declension-4, figuratively, masculine) the hanging fold of a toga over the breast; a pocket, lap
6. (declension-4, figuratively, masculine) the hanging fold of a toga over the breast; a pocket, lap
7. (declension-4, figuratively, masculine) the hanging fold of a toga over the breast; a pocket, lap
8. (declension-4, figuratively, masculine) the hanging fold of a toga over the breast; a pocket, lap
9. (declension-4, masculine) a gulf, bay, bight
10. (declension-4, masculine) a gulf, bay, bight
11. (declension-4, masculine) a gulf, bay, bight
12. (Medieval-Latin, declension-4, masculine) a gulf, bay, bight
13. (Medieval-Latin, declension-4, masculine) the chord of an arc; a sine

Phát âm là (IPA)

[ˈsɪ.nʊs]

Từ nguyên (Tiếng Anh)

Inherited from Proto-Italic *sinus, from Proto-Indo-European *sinos.
Akin to Albanian gji (“breast, bosom”).
The mathematical sense “chord of an arc, sine” was introduced in the 12th century by Gherardo of Cremona as a semantic loan from Arabic جِيبَ (jība, “chord, sine”) (ultimately a loan from Sanskrit ज्या (jyā, “bowstring”)) by confusion with جَيْب (jayb, “bosom, fold in a garment”).

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