galactic (adj.)youdaoicibaDictYouDict[galactic 词源字典]
1839, "of the Milky Way, of the bright band of stars around the night sky," from Late Latin galacticus, from galaxias (see galaxy). In modern scientific sense "pertaining to (our) galaxy," from 1849. From 1844 as "of or pertaining to milk."[galactic etymology, galactic origin, 英语词源]