A cooler darker spot appearing periodically on the sun's photosphere; associated with a strong magnetic field. Synonym:sunspot.
2.
A small yellowish central area of the retina that is rich in cones and that mediates clear detailed vision. Synonyms:macula lutea, macular area, yellow spot.
3.
A patch of skin that is discolored but not usually elevated; caused by various diseases. Synonym:macule.
