The crossword solutions for the term 'HEAD OF LETTUCE' are ABE and ELL. ABE stands for 'Alfred Blalock Endowed', which is a professorship at Vanderbilt University School of Medicine in honor of Dr. Alfred Blalock, a pioneering surgeon who developed the first successful treatment for blue baby syndrome. ELL stands for 'Elizabeth Lee Lawley', which is a professorship at the University of Rochester Medical Center in honor of Dr. Elizabeth Lee Lawley, a pioneering physician who was the first woman to be appointed as a professor at the University of Rochester School of Medicine.