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⇱ RA Definition & Meaning - Merriam-Webster

ra

1 of 4

abbreviation (1)

range
: the Egyptian sun god and chief deity

Ra

3 of 4

symbol

radium

RA

4 of 4

abbreviation (2)

1
regular army
2
research assistant
3
residence assistant; resident assistant
4
rheumatoid arthritis
5
right ascension
6
Royal Academician; Royal Academy

Word History

Etymology

Noun

Egyptian rΚ½

First Known Use

Noun

1877, in the meaning defined above

Time Traveler
The first known use of ra was in 1877

Rhymes for ra

Browse Nearby Words

Cite this Entry

β€œRa.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ra. Accessed 7 Apr. 2026.

Medical Definition

Ra

1 of 2 symbol
radium

RA

2 of 2 abbreviation
rheumatoid arthritis

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Merriam-Webster unabridged

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