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  1. the 10th letter of the Arabic alphabet.
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Origin of

From Arabic


noun Egyptian Religion.
  1. a sun god of Heliopolis, a universal creator worshiped throughout Egypt (typically represented as a hawk-headed man bearing on his head the solar disk and the uraeus).
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Also Re.


Symbol, Chemistry.
  1. radium.
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  1. regular army.
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  1. rear admiral.
  2. Astronomy. right ascension.
  3. royal academician.
  4. Royal Academy.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for ra

Contemporary Examples

Historical Examples

  • He also is, like Ra and Osiris, a god of the under-world to which men go after death.

    History of Religion

    Allan Menzies

  • Thus it was that other deities assumed a solar character as forms of Ra.

  • O Ra, Ra, to think that it was you all the while who were committing all these thefts!

    St. Winifred's

    Frederic W. Farrar

  • Remember the leap to death and the Boat of Ra, and those by whom it was captained.

    Morning Star

    H. Rider Haggard

  • The primacy of Ra is illustrated by the fact that Amon was identified with him.

British Dictionary definitions for ra


the chemical symbol for
  1. radium
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  1. the ancient Egyptian sun god, depicted as a man with a hawk's head surmounted by a solar disc and serpent
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abbreviation for
  1. rear admiral
  2. astronomy right ascension
  3. (in Britain) Royal Academician or Academy
  4. (in Britain) Royal Artillery
  5. Argentina (international car registration)
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Word Origin

(sense 5) from República Argentina
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

Word Origin and History for ra


"hawk-headed sovereign sun god of Egyptian mythology," from Egyptian R' "sun, day."

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Online Etymology Dictionary, © 2010 Douglas Harper

ra in Medicine


  1. The symbol for the elementradium

ra in Science



The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.