sol

/soʊl/
noun
  1. The fifth note of the musical scale in solfège; also called 'so'.
    • The melody goes do, re, mi, fa, sol, la, ti, do.
    • She sang the sol note perfectly during the vocal exercise.
    • In the song, the highest note is a sol.
  2. A day on the planet Mars (a Martian solar day).
    • Scientists track the mission in sols rather than Earth days.
    • A sol on Mars is about 24 hours and 39 minutes long.
    • The rover traveled 100 meters on its third sol on Mars.
  3. A colloidal solution or suspension, especially in chemistry.
    • The lab studied the properties of a silica sol.
    • The chemist prepared a sol by mixing the powder with water.
    • A sol can turn into a gel under certain conditions.
Synonyms
What does "sol" mean? | whatsthatwordmean | whatsthatwordmean