bulb angle[′bəlb ‚aŋ·gəl]
A steel angle iron enlarged to a bulbous thickening at one end.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
angle iron, one side of which thickens toward the edge, forming a bulbous rib.An
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.