Botany. The loss of the normal green coloration of leaves of plants (esp. as a symptom of disease or disorder), caused by conditions which reduce…

any of various plant diseases in which leaves shrivel and turn brown, caused chiefly by fungi and bacteria; (also) = leaf scorch n.

any of various plant diseases and disorders, frequently due to environmental conditions, in which leaves shrivel and turn brown.

chlorosis of plants caused by magnesium deficiency in the soil.

Any of various other diseases and physiological disorders of plants characterized by yellowing of foliage or other parts. Frequently with…

anaemia resulting from depletion of the body's stores of iron, typically associated with dietary insufficiency of iron and/or chronic loss of blood.