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hg

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  1. hectogram; hectograms.
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Hg

Symbol, Chemistry.
  1. mercury.
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Origin of Hg

< New Latin hydrargyrum, for Latin hydrargyrus (by analogy with aurum, argentum, etc.) < Greek hydrárgyros literally, liquid silver (hydr- hydr-1 + árgyros silver)

HG

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

  1. High German(def 1).
  2. His Grace; Her Grace.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for hg

hg

abbreviation for
  1. hectogram
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Hg

the chemical symbol for
  1. mercury
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Word Origin

from New Latin hydrargyrum

HG

abbreviation for
  1. High German
  2. His (or Her) Grace
  3. (formerly, in Britain) Home Guard
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

hg in Medicine

Hg

  1. The symbol for the elementmercury

hg in Science

Hg

mercury

[mûrkyə-rē]
Word History: Like a few other elements, mercury has a chemical symbol, Hg, that bears no resemblance to its name. This is because Hg is an abbreviation of the Latin name of the element, which was hydrargium. This word in turn was taken over from Greek, where it literally meant “water-silver.” With this name the Greeks were referring to the fact that mercury is a silvery liquid at room temperature, rather than a solid like other metals. Similarly, an older English name for this element is quicksilver, which means “living silver,” referring to its ability to move like a living thing. (The word quick used to mean “alive,” as in the Biblical phrase “the quick and the dead.”) The name mercury refers to the fact that the element flows about quickly: the name comes from the Roman god Mercury, who was the swift-footed messenger of the gods.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.