Si (Noun)
Meaning 1
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.
Classification
Nouns denoting substances.
Synonyms
Hypernyms
Meaning 2
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); "Today the United States is the only country in the world not totally committed to the Systeme International d'Unites".
Classification
Nouns denoting quantities and units of measure.
Synonyms
- SI Unit
- SI System
- International System Of Units
- Systeme International D'Unites
- International System
- Systeme International
Hypernyms
Meaning 3
The syllable naming the seventh (subtonic) note of any musical scale in solmization.
Classification
Nouns denoting communicative processes and contents.