black hole (n.)youdaoicibaDictYouDict[black hole 词源字典]
in astrophysics, 1968, probably with awareness of Black Hole of Calcutta, incident of June 19, 1756, in which 146 British POWs taken by the Nawab of Bengal after the capture of Ft. William, Calcutta, were held overnight in punishment cell of the barracks (meant to hold 4 people) and all but 23 perished.[black hole etymology, black hole origin, 英语词源]