hg
| Noun | 1. |  Hg - a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures |
| 2. | hg - 100 grams Synonyms: hectogram |
| Noun | 1. | Hg - a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures |
| 2. | hg - 100 grams Synonyms: hectogram |