| Mercury | |
| 1. n. (dated) A carrier of tidings; a newsboy; a messenger. | |
| 2. n. (dated) A newspaper. | |
| 3. n. A metal. | |
| 4. n. A silvery-colored, toxic, metallic chemical element, liquid at room temperature, with atomic number 80 and symbol Hg. | |
| 5. n. (science, historical) One of the elemental principles formerly thought to be present in all metals. | |
| 6. n. (with definite article) Ambient pressure or temperature (from the use of mercury in barometers and thermometers). | |
| The mercury there has averaged 37.6C, 2.3C above the February norm. | |
| 7. n. (obsolete) Liveliness, volatility. | |
| 8. n. A plant. | |
| 9. n. An annual plant, annual mercury (Mercurialis annua), formerly grown for its medicinal properties; French mercury, (vern, herb mercury). | |
| 10. n. A similar edible plant, , otherwise known as English mercury or allgood. | |
| 11. n. (US, regional) The poison oak or poison ivy. | |
