-ləˈsərtē-, -d.ē- noun
also bl lac object -ˈlak-
Usage: usually capitalized B & both Ls
Etymology: BLatin Lacertae , original designation for the first such object to be discovered, from BLatin , designation for the 89th variable star in a constellation + New Latin Lacertae , gen. of Lacerta , a constellation
: a celestial object that is similar to a quasar in the intensity of its radiation and is recognizable by its radio emissions