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Dictionary and Thesaurus entries for:

ra

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ra [n]
 
1)an intensely radioactive metallic element that occurs in minute amounts in uranium ores
    Synonyms :atomic_number_88 radium 
    See Also: metal  uranium_ore 
 
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"
    Synonyms :celestial_longitude right_ascension 
    See Also: angular_distance  astronomy 
 
3)ancient hawk-headed Egyptian sun god; a universal creator
    Synonyms :re 
    See Also: egyptian_deity 
 



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