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epiphytotic

American  
[ep-uh-fahy-tot-ik] / ˌɛp ə faɪˈtɒt ɪk /

adjective

  1. (of a disease) destroying a large number of plants in an area at the same time.


noun

  1. the widespread, destructive outbreak of a plant disease.

epiphytotic British  
/ ˌɛpɪfaɪˈtɒtɪk /

adjective

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

"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 Scientific  
/ ĕp′ə-fī-tŏtĭk /
  1. Relating to or characterized by a sudden or abnormally destructive outbreak of a plant disease, usually over an extended geographic area.


Etymology

Origin of epiphytotic

First recorded in 1895–1900; epi- + -phyte + -otic