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epiphytotic

[ep-uh-fahy-tot-ik]
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adjective
  1. (of a disease) destroying a large number of plants in an area at the same time.
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noun
  1. the widespread, destructive outbreak of a plant disease.
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Origin of epiphytotic

First recorded in 1895–1900; epi- + -phyte + -otic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for epiphytotic

epiphytotic

adjective
  1. (of plant diseases and parasites) affecting plants over a wide geographical region
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Word Origin

from epi- + -phyte + -otic
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
epiphytotic in Science

epiphytotic

[ĕp′ə-fī-tŏt′ĭk]
  1. Relating to or characterized by a sudden or abnormally destructive outbreak of a plant disease, usually over an extended geographic area.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.