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| 1. | [ noun ] a complete metric system of units of measurement for scientists; fundamental quantities are length (meter) mass (kilogram) time (second) electric current (ampere) temperature (kelvin) amount of matter (mole) and luminous intensity (candela) | |
| Synonyms: | Systeme_International International_System international_system_of_units si_system Systeme_International_d'Unites | |
| Related terms: | metric_system | |
| 2. | [ noun ] (chemistry,physics,electronics) a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors | |
| Synonyms: | atomic_number_14 silicon | |
| Related terms: | chemical_element semiconductor clay sand silicone granite feldspar quartz | |
| 3. | [ noun ] (music,linguistics) the syllable naming the seventh (subtonic) note of any musical scale in solmization | |
| Synonyms: | te ti | |
| Related terms: | solfa_syllable | |
| Similar spelling: |
Siu Sia S |
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