[ˈsɪ.nʊs], [ˈsiː.nus]
OriginInherited 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”).
- declension-4, masculine, poetica bent surface; a curve, fold, hollow
- declension-4, masculinea purse, money (which was carried in the bosom of the toga)
- declension-4, masculine, poetica garment
“[…] ‘comitēs, accēdite’ dīxit” — ‘Come, my companions,’ she said,
‘and carry back flowers with me, filling the folds of your garments.’
- declension-4, masculinethe bosom, breast
“Quī cum sedēns ad mēnsam nōn habēret ad manum, ubi oblātum sibi mūnus repōneret, mīsit hoc in sinum sibi.” — Having nowhere to put what had been brought him when sitting at the table, he shoved it into his bosom.
- declension-4, figuratively, masculinethe bosom for love, protection, asylum
- declension-4, figuratively, masculinethe interior, inmost part of a thing
- declension-4, figuratively, masculinea power, possession of someone
- declension-4, figuratively, masculinea hiding place, place of concealment; a secret feeling
- declension-4, masculinea gulf, bay, bight
“Est in sēcessū longō locus: īnsula portum
efficit obiectū laterum, quibus omnis ab altō” — After long sailing comes land: here an island, its sides jutting round, forms a haven, against which every wave [coming] from the deep sea shatters, and spreads itself into the hollows of the bay.
- declension-4, masculinethe land lying on or a point of land that helps to form a gulf
- declension-4, masculinea basin, hollow, valley
- Medieval-Latin, declension-4, masculinea fjord
- Medieval-Latin, declension-4, masculinethe chord of an arc; a sine
Formssinūs(genitive) · sinus(nominative, singular) · sinūs(nominative, plural) · sinūs(genitive, singular) · sinuum(genitive, plural) · sinuī(dative, singular) · sinibus(dative, plural) · sinum(accusative, singular) · sinūs(accusative, plural) · sinū(ablative, singular) · sinibus(ablative, plural) · sinus(singular, vocative) · sinūs(plural, vocative)
Source: Wiktionary