The Collaborative International Dictionary of English v.0.48:

Macula \Mac"u*la\, 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