Gummosis

 Gummosis is the formation of patches of a gummy substance on the surface of certain plants, particularly fruit trees. This occurs when sap oozes from wounds or cankers as a reaction to outside stimuli such as adverse weather conditions, infections, insect problems, or mechanical damage. It is understood as a plant physiological disease.[1]

Canker-induced gummosis on a Tibetan cherry

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 Metasyntactic variable, which is released under the 
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