bl (lacertae object)
In the article “Optical and infrared polarization of active extragalactic objects,” by J.R.P. Angel and H.S. Stockman, Annual Review of Astronomy and Astrophysics, vol. 18 (1980), pp. 321-61, the word is attributed to the Columbia University physicist Edward A. Spiegel: “In a memorable banquet speech at the Pittsburgh meeting on BL Lac objects (the only words spoken not faithfully reported in the proceedings) Ed Spiegel suggested the name ‘blazar’ for this class of object. A combination of B L Lac object and quasar, with a strong feeling of the characteristic violent optical flaring, blazar seems an excellent name, one which we will adopt throughout the review.” The proceedings of the conference in question were published as Pittsburgh Conference on BL LAC Objects, held at the University of Pittsburgh, April 24-26, 1978, edited by Arthur M. Wolfe (University of Pittsburgh, 1978).