sol

ot noun

1. The fifth step in the solfège scale of C (Ut), preceded by fa and followed by la.
2. A solar day on Mars (equivalent to 24 hours, 39 minutes, 35 seconds).
3. A Spanish-American gold or silver coin, now the main currency unit of Peru (also new sol), or a coin of this value.
4. A type of colloid in which a solid is dispersed in a liquid.