Look up solidus in Wiktionary, the free dictionary.
Solidus (Latin for "solid") may refer to:
- Solidus (coin), a Roman coin of nearly solid gold
- Solidus (punctuation), or slash, a punctuation mark
- Solidus (chemistry), the line on a phase diagram below which a substance is completely solid
- Solidus Snake, a character in Metal Gear Solid 2: Sons of Liberty