1.Definition: (Roman mythology) messenger of Jupiter and god of commerce; counterpart of Greek Hermes

Category: People

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

Related Noun(s):hydrargyrum, quicksilver

Category: General

3.Definition: temperature measured by a mercury thermometer

"The mercury was falling rapidly"

Category: General

4.Definition: the smallest planet and the nearest to the sun

Category: Objects