BL Lacertae object


BL La·​cer·​tae object
variants or less commonly BL Lac object
: a celestial object that is similar to a quasar in the intensity of its radiation and is recognizable by its radio emissions

Word History


BL Lacertae, original designation for the first such object to be discovered, from BL, designation for the 89th variable star in a constellation + New Latin Lacertae, genitive of Lacerta, a constellation

First Known Use

1975, in the meaning defined above

Time Traveler
The first known use of BL Lacertae object was in 1975

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Dictionary Entries Near BL Lacertae object


BL Lacertae object


Cite this Entry

“BL Lacertae object.” Dictionary, Merriam-Webster, Accessed 4 Oct. 2023.

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