BL Lacertae object

BL La·​cer·​tae object | \ -ləˈsərtē-, -tē- \
variants: or less commonly BL Lac object \ -​ˈlak-​ \

Definition of BL Lacertae object

: a celestial object that is similar to a quasar in the intensity of its radiation and is recognizable by its radio emissions

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

First Known Use of BL Lacertae object

1975, in the meaning defined above

History and Etymology for BL Lacertae object

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

Learn More About BL Lacertae object

Time Traveler for BL Lacertae object

Time Traveler

The first known use of BL Lacertae object was in 1975

See more words from the same year

Dictionary Entries Near BL Lacertae object


BL Lacertae object


See More Nearby Entries 

Statistics for BL Lacertae object

Cite this Entry

“BL Lacertae object.” Dictionary, Merriam-Webster, Accessed 18 Aug. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon


Test Your Vocabulary

The Great British Vocabulary Quiz

  • union jack speech bubble
  • Named after Sir Robert Peel, what are British police called?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!