Mercury

What does MERCURY mean?

1. noun

   a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures

2. noun

   (Roman mythology) messenger of Jupiter and god of commerce; counterpart of Greek Hermes

3. noun

   the smallest planet and the nearest to the sun

4. noun

   temperature measured by a mercury thermometer

   “the mercury was falling rapidly”

Definitions from WordNet 3.1, Princeton University.