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Definitions and Synonyms of ra | Another word for ra | What is ra?

Definition 1: (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 - [noun denoting location]

Samples where ra or its synonyms are used according to this definition

  • one hour of right ascension equals fifteen degrees

Synonyms for ra in the sense of this definition

(ra is a kind of ...) the angular separation between two objects as perceived by an observer

"he recorded angular distances between the stars"

(ra belongs to category ...) the branch of physics that studies celestial bodies and the universe as a whole

Definition 2: 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 - [noun denoting person]

Synonyms for ra in the sense of this definition

(ra is an instance of ...) a deity worshipped by the ancient Egyptians

(ra belongs to category ...) the historic period preceding the Middle Ages in Europe

Definition 3: an intensely radioactive metallic element that occurs in minute amounts in uranium ores - [noun denoting substance]

Synonyms for ra in the sense of this definition

(ra is a kind of ...) any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.

(... is made of the substance ra) any ore from which uranium can be extracted

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