[f. BACK a.] A large log placed at the back of the fire. (Chiefly in U.S.)
1684. I. Mather, Illustr. Provid., v. 115. The spit came down with the point foremost, and stuck in the back-log.
1882. Howells, in Longm. Mag., I. 49. A back-log big enough to smoulder for days.
1883. Ellen H. Rollins (E. H. Arr), New Eng. Bygones, 63. Brightened by a roaring backlog.