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.

Dutch: kiezel, silicium
Polish: krzem, Si

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).

synonyms: International System, International System of Units, SI system, SI unit, Systeme International, Systeme International d'Unites.

Dutch: Système International
Polish: Międzynarodowy Układ Jednostek Miar, układ SI

The syllable naming the seventh (subtonic) note of any musical scale in solmization.

synonyms: te, ti.