A macule is a flat, distinct, colored area of skin that is usually less than 10 millimeters wide, and does not include a change in skin texture or thickness.
Habif TP, ed. Principles of diagnosis and anatomy. Clinical Dermatology. 5th ed. St. Louis, Mo: Mosby Elsevier; 2009:chap 1.
David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.