blotch

[ bloch ]
/ blɒtʃ /

noun

a large, irregular spot or blot.
Plant Pathology.
  1. a diseased, discolored spot or area on a plant.
  2. a disease so characterized, usually accompanied by cankers and lesions.
a skin eruption; blemish.

verb (used with object)

to mark with blotches; blot, spot, or blur: The floor of the forest was blotched with cool, dark moss.

adjective

Textiles. of or relating to blotch printing, or to the colored ground produced by this process.

Origin of blotch

1595–1605; perhaps blend of blot1 + botch2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for blotch

blotch
/ (blɒtʃ) /

noun

an irregular spot or discoloration, esp a dark and relatively large one such as an ink stain

verb

to become or cause to become marked by such discoloration
(intr) (of a pen or ink) to write or flow unevenly in blotches

Word Origin for blotch

C17: probably from botch, influenced by blot 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for blotch

blotch
[ blŏch ]

Any of several plant diseases caused by fungi and resulting in brown or black dead areas on leaves or fruit.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.