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We found 3 dictionaries that define the word BL Lacertae:

General (1 matching dictionary)
  1. BL Lacertae: Wikipedia, the Free Encyclopedia

Science (2 matching dictionaries)
  1. BL Lacertae, BL Lacertae: Extragalactic Astronomy

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Definitions from Wikipedia (BL Lacertae)

▸ noun:  BL Lacertae or BL Lac is a highly variable, extragalactic active galactic nucleus (AGN or active galaxy).


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