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Dictionary definition for the word "ra"
ra
(noun)
3 definitions 1: an intensely radioactive metallic element that occurs in minute amounts in uranium ores [syn: radium, atomic number 88] 2: (astronomy) the angular distance eastward along the celestial equator from the vernal equinox to the intersection of the hour circle that passes through the body; expressed in hours and minutes and second; used with declination to specify positions on the celestial sphere; "one hour of right ascension equals fifteen degrees" [syn: right ascension, celestial longitude] 3: ancient hawk-headed Egyptian sun god; a universal creator [syn: Re] |
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