Yellow spot Meaning, Definition & Usage

  1. noun any of several fungous or viral diseases characterized by yellow spotting on the leaves
  2. noun a small yellowish central area of the retina that is rich in cones and that mediates clear detailed vision
    macular area; macula; macula lutea.

WordNet

Definitions
  1. . (a) (Anat.) A small yellowish spot with a central pit, the fovea centralis, in the center of the retina where vision is most accurate. See Eye. (b) (Zoöl.) A small American butterfly (Polites Peckius) of the Skipper family. Its wings are brownish, with a large, irregular, bright yellow spot on each of the hind wings, most conspicuous beneath. Called also Peck's skipper. See Illust. under Skipper, n., 5.

Webster 1913