Synonyms and Antonyms for si

1. si (n.)

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


2. do-si-do (n.)

a square-dance figure; two dancers approach each other and circle back to back before returning to their original places


3. Si (n.)

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: Antonyms:

4. SI (n.)

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)