SI

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SI (SI units) Système International d'Unités, an internationally agreed group of units of measurement, used especially in scientific work. The system comprises seven basic and two supplementary units. The basic units are the: metre (m); kilogram (kg); second (s); ampere (A); kelvin (K); mole (mol); and candela (cd). The supplementary units are the: radian (rad); and steradian (sr). A further 18 units are derived from these: becquerel (Bq); coulomb (C); farad (F); gray (Gy); henry (H); hertz (Hz); joule (J); lumen (lm); lux (lx); newton (N); ohm (Ω); pascal (Pa); siemens (S); sievert (Sv); tesla (T); volt (V); watt (W); and weber (Wb).

si

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si (Fr.). The note B (see pitch names of the notes). si bémol, B♭, si dièse, B♯. Also 7th degree of major scale according to d'Arezzo system. In tonic sol-fa it has been changed to te.

SI

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SI • abbr. ∎  the international system of units of measurement. ∎  Law statutory instrument.

si

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si / sē/ • n. Mus. another term for ti.

si

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si (mus.) seventh note of the scale in solmization. XVIII. — F. — It. si; see UT.

Si

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Si • symb. the chemical element silicon.

SI

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Si

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Si See silicon.

Si

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Si See SILICON.

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