Synonyms of sis

1. sister, sis, female sibling: usage: a female person who has the same parents as another person; "my sister married a musician"

1. sister, sis, female sibling: usage: 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
2. silicon, Si, atomic number 14, chemical element, element, semiconductor, semiconducting material: usage: 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"
3. Systeme International d'Unites, Systeme International, SI system, SI, SI unit, International System of Units, International System, metric system: usage: the syllable naming the seventh (subtonic) note of any musical scale in solmization