Macula n. : A spot, as on the skin, or on the surface of the sun or of some other luminous orb.

Macula n. : A rather large spot or blotch of color.

Example:
Any first hand experience in using AVASTIN for Macula degeneration treatment?

Taxonomy
macula lutea, free encyclopedia, the human eye, the eye, Retina, central vision, macular hole, macular sparing, navs, Human eye, eye, search, cross-sectional view, oval-shaped, diameter, histologically, layers, pit.

Defination from the web:
macula, destroying it. ... Visual input to the macula occupies a substantial portion of the brain's visual capacity. As a result, some forms of visual field loss ...