Pronunciation: (bloch), [key]
1. a large, irregular spot or blot.
2. Plant Pathol.
a. a diseased, discolored spot or area on a plant.
b. a disease so characterized, usually accompanied by cankers and lesions.
3. a skin eruption; blemish.
to mark with blotches; blot, spot, or blur: The floor of the forest was blotched with cool, dark moss.
Textiles.of or pertaining to blotch printing, or to the colored ground produced by this process.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.