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Definitions of Si:

noun:   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
noun:   the syllable naming the seventh (subtonic) note of any musical scale in solmization
noun:   a complete metric system of units of measurement for scientists; fundamental quantities are length (meter) and mass (kilogram) and time (second) and electric current (ampere) and temperature (kelvin) and amount of matter (mole) and luminous intensity (candela)
name:  A surname (very rare: popularity rank in the U.S.: #39223)

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Alternative Terms
antidiuretic-hormone-adh-test-normal-results imperial-unit adrenocorticotropic-hormone-test-normal-results mole thrust time meter0 specific-fuel-consumption atmosphere litre specific-impulse magnetic-field-density illuminance luminous-intensity

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