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/sˈiː/
/ˈsi/a metric unit of measurement used to determine the temperature of a place or thing based on which water boils at 100° and freezes at 0° under standard conditions
an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds
a unit of electrical charge equal to the amount of charge transferred by a current of 1 ampere in 1 second
one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
a vitamin found in fresh fruits (especially citrus fruits) and vegetables; prevents scurvy
the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second