si
/siː/ noun, proper noun
Forms sis ti Sy Su Ssu Szu S.I.
- noun (music) A syllable used in solfège to represent the seventh note of a major scale.
- proper noun International System of Units
- proper noun A diminutive of the male given name Simon.
- proper noun A diminutive of the female given name Simone.
- proper noun A diminutive of the male given name Silas.
- proper noun A river in Shandong, China.
- proper noun A county of Suzhou, Anhui, China.
- proper noun (historical) Various prefectures of imperial China.
- proper noun (chiefly historical) A surname from Mandarin.
Synonyms
Sixian Ssu-hsien Sizhou Ssu-chou silicon atomic number 14 Systeme International d'Unites Systeme International SI system SI unit International System of Units International System ti te
Etymology
From Middle English si (“seventh degree or note of Guido of Arezzo's hexachordal scales”), Italian si in the solmization of Guido of Arezzo, from the initials of Latin Sāncte Iohannēs (“Saint John (the Baptist)”) in the lyrics of the scale-ascending hymn Ut queant laxis by Paulus Deacon; thus, also an initialism of Sāncte Iohannēs.
Borrowed from French SI (“Système international d'unités”).
From clipping of various words beginning with the syllable /saɪ/.
From the Hanyu Pinyin romanizations of the Mandarin pronunciations of Chinese 泗 (Sì), 肆 (Sì), and 姒 (Sì, “a surname, older brother's wife”).
Sources: Wiktionary · WordNet 3.0 — from the Wiktionary entry “si”, CC BY-SA 4.0. Details