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Definition of Ra
1. Noun. An intensely radioactive metallic element that occurs in minute amounts in uranium ores.
Generic synonyms: Metal, Metallic Element
Substance meronyms: Uranium Ore
2. Noun. Ancient Egyptian sun god with the head of a hawk; a universal creator; he merged with the god Amen as Amen-Ra to become the king of the gods.
3. Noun. (astronomy) the equatorial coordinate specifying the angle, measured eastward along the celestial equator, from the vernal equinox to the intersection of the hour circle that passes through an object in the sky; usually expressed in hours and minutes and seconds; used with declination to specify positions on the celestial sphere. "One hour of right ascension equals fifteen degrees"
Category relationships: Astronomy, Uranology
Generic synonyms: Angular Distance
Definition of Ra
1. n. A roe; a deer.
Definition of Ra
1. Initialism. Rear admiral, a rank in the Royal Navy. ¹
2. Initialism. Royal Academy, the '''Royal Academy of Arts''' is an art institution based in London, England. ¹
3. Initialism. Royal Academician, a member of the Royal Academy. ¹
4. Initialism. Royal Artillery, a regiment in the British Army. ¹
5. Initialism. Resident Assistant, a trained student leader, within a college or university, who is given the responsibility of supervising students living in a residence hall. ¹
6. Initialism. Republic of Armenia ¹
7. Initialism. Rahmatullah Alaih (God's blessing be upon him); a suffix used by Muslims in reference to honored individuals. ¹
8. Proper noun. (Egyptian mythology) The Egyptian god of the sun. ¹
9. Noun. (geology) Any of a series of moraines, in parts of Norway, that are long ridges covered with stones. ¹
¹ Source: wiktionary.com
Medical Definition of Ra
1. The celebrated radioactive element discovered by Marie and pierre curie in 1898. (12 Dec 1998)