hg

1. hectogram; hectograms.

Symbol, Chemistry.

1. mercury.

1. High German.
2. British. Home Guard.

1. High German(def 1).
2. His Grace; Her Grace.

abbreviation for

1. hectogram

the chemical symbol for

1. mercury

abbreviation for

1. High German
2. His (or Her) Grace
3. (formerly, in Britain) Home Guard

1. The symbol for the elementmercury

1. The symbol for mercury.

Hg

1. A silvery-white, dense, poisonous metallic element that is a liquid at room temperature and is used in thermometers, barometers, batteries, and pesticides. Atomic number 80; atomic weight 200.59; melting point -38.87°C; boiling point 356.58°C; specific gravity 13.546 (at 20°C); valence 1, 2. See Periodic Table.