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[rah]
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noun
  1. the 10th letter of the Arabic alphabet.

Origin of

From Arabic

Ra

[rah]
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).
Also Re.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for ras

RAS

abbreviation for
  1. Royal Agricultural Society
  2. Royal Astronomical Society

RA

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)

Word Origin

(sense 5) from República Argentina

Ra1

the chemical symbol for
  1. radium

Ra2

Re

noun
  1. the ancient Egyptian sun god, depicted as a man with a hawk's head surmounted by a solar disc and serpent
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 ras

Ethiopian title, from Amharic ras "chief, head," from Arabic ra's.

Ra

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

Online Etymology Dictionary, © 2010 Douglas Harper

ras in Medicine

RAS

abbr.
  1. reticular activating system

Ra

  1. The symbol for the elementradium

ras in Science

Ra

  1. The symbol for radium.