Meaning : A cooler darker spot appearing periodically on the sun's photosphere. Associated with a strong magnetic field.
Synonyms : sunspot
Meaning : 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
Meaning : A patch of skin that is discolored but not usually elevated. Caused by various diseases.
Synonyms : macule