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Noun aurora has 3 senses
dawn, dawning, morning, aurora, first light, daybreak, break of day, break of the day, dayspring, sunrise, sunup, cockcrow - the first light of day; "we got up before dawn"; "they talked until morning"--1 is a kind of hour, time of day
 
aurora - an atmospheric phenomenon consisting of bands of light caused by charged solar particles following the earth's magnetic lines of force--2 is a kind of atmospheric phenomenon
 --2 has part: streamer
 --2 has particulars:
 Aurora - (Roman mythology) goddess of the dawn; counterpart of Greek Eos--3 is a kind of Roman deity
 
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