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[[File:lighterstill.jpg]][[File:Diseases_heart.jpg|right|frame]]
[[File:lighterstill.jpg]][[File:Diseases_heart.jpg|right|frame]]
==Etymology==
[http://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English] disese, from Anglo-French desease, desaise, from des- dis- + eise ease
*Date: [http://en.wikipedia.org/wiki/14th_Century 14th century]
==Definition==
*1 obsolete : trouble
*2 : a condition of the living [[animal]] or plant [[body]] or of one of its parts that impairs [[normal]] [[function]]ing and is typically [[manifested]] by distinguishing signs and symptoms : sickness, malady
*3 : a harmful [[development]] (as in a social institution)
==Description==
'''Disease''' is a pathological [[state]] of a part of an [[organism]]. Disease may be brought about by multiple causes such as [[genetic]], infectious, or [[environment]]al factors. Distinct symptoms usually indicate the [[presence]] of disease.
'''Disease''' is a pathological [[state]] of a part of an [[organism]]. Disease may be brought about by multiple causes such as [[genetic]], infectious, or [[environment]]al factors. Distinct symptoms usually indicate the [[presence]] of disease.
