Ra

[rah] /rɑ/

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).
Symbol, Chemistry.
1.
.
1.
regular army.
[rah] /rɑ/
noun
1.
the 10th letter of the Arabic alphabet.
1.
rear admiral.
2.
Astronomy. right ascension.
3.
royal academician.
4.
Royal Academy.
Chemical symbol
1.
radium
/rɑː/
noun
1.
the ancient Egyptian sun god, depicted as a man with a hawk’s head surmounted by a solar disc and serpent
abbreviation
1.
rear admiral
2.
(astronomy) right ascension
3.
(in Britain) Royal Academician or Academy
4.
(in Britain) Royal Artillery
5.
Argentina (international car registration)

“hawk-headed sovereign sun god of Egyptian mythology,” from Egyptian R’ “sun, day.”

Ra
The symbol for the element radium.
Ra
The symbol for radium.
radium
(rā’dē-əm)
Symbol Ra
A rare, bright-white, highly radioactive element of the alkaline-earth group. It occurs naturally in very small amounts in ores and minerals containing uranium, and it is naturally luminescent. Radium is used as a source of radon gas for the treatment of disease and as a neutron source for scientific research. Its most stable isotope is Ra 226 with a half-life of 1,622 years. Atomic number 88; melting point 700°C; boiling point 1,737°C; valence 2. See Periodic Table.

noun

Anger; the RED ASS (1942+)
radium
1.
Argentina (international vehicle ID)
2.
rear admiral
3.
reasonable alternative
4.
regular army
5.
remedial action
6.
research assistant
7.
research associate
8.
resident advisor
9.
resident assistant
10.
rheumatoid arthritis
11.
right ascension
12.
right atrium
13.
risk analysis
14.
route analysis
Royal Academy