si : Idioms & Phrases


do-si-do

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

si quis

Si` quis"
Etymology
L., if any one (the first words of the notice in Latin).
Definitions
  1. (Ch. of Eng.) A notification by a candidate for orders of his intention to inquire whether any impediment may be alleged against him.
Webster 1913

si system

  • noun 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)
    Systeme International; SI system; International System of Units; International System; SI; Systeme International d'Unites.
    • Today the United States is the only country in the world not totally committed to the Systeme International d'Unites
WordNet

si unit

  • noun 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)
    Systeme International; SI system; International System of Units; International System; SI; Systeme International d'Unites.
    • Today the United States is the only country in the world not totally committed to the Systeme International d'Unites
WordNet