[1] : The Collaborative International Dictionary of English v.0.48

macula \mac"ula\, n.; pl. maculae. l., spot, stain, blot.
   see mail armor, and cf. mackle, macule.
   1. a spot, as on the skin, or on the surface of the sun or of
      some other luminous orb; called also macule.
      1913 webster

   2. zool. a rather large spot or blotch of color.
      1913 webster macula lutea
see also:
maculae mail mackle macule macule 

[2] : WordNet (r) 2.0

macula
     n 1: a cooler darker spot appearing periodically on the sun's
          photosphere; associated with a strong magnetic field
          syn: sunspot
     2: a yellowish central area of the retina that is rich in cones
        and that mediates clear detailed vision syn: macula
        lutea, macular area, yellow spot
     3: a patch of skin that is discolored but not usually elevated;
        caused by various diseases syn: macule
     also: maculae pl
see also:
sunspot macula lutea macular area yellow spot macule maculae 

Macula >> M Words
Macula, definition of term: Macula
macula_pag1.html

Macula Lutea >> M Words
Macula Lutea, definition of term: Macula Lutea
macula+lutea_pag1.html