Reference meaning
Ra
Last updated
an intensely radioactive metallic element that occurs in minute amounts in uranium ores
Related source terms
Other meanings
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
Source and scope
This definition is reproduced from Princeton WordNet 3.0, sense 14651921-n, under the WordNet 3.0 License. It has not yet received VocabularyBase editorial review. Read the source and license details.