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ra    音標拼音: [r'ɑ]
n. [埃及神話] 太陽神

[埃及神話] 太陽神

Ra
n 1: an intensely radioactive metallic element that occurs in
minute amounts in uranium ores [synonym: {radium}, {Ra},
{atomic number 88}]
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 [synonym: {Ra}, {Re}]
3: (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" [synonym: {right ascension},
{RA}, {celestial longitude}]



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