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noun, Pathology.
a type of allergic rhinitis affecting the mucous membranes of the eyes and respiratory tract, affecting susceptible persons usually during the summer, caused by pollen of ragweed and certain other plants.
an allergic reaction to pollen, dust, etc, characterized by sneezing, runny nose, and watery eyes due to inflammation of the mucous membranes of the eyes and nose Technical names allergic rhinitis, pollinosis

also hay-fever, 1829, from hay + fever; earlier it was called summer catarrh.

hay fever n.
An allergic condition affecting the mucous membranes of the upper respiratory tract and the eyes, usually characterized by nasal discharge, sneezing, and itchy, watery eyes and usually caused by an abnormal sensitivity to airborne pollen.
hay fever
An seasonal allergic condition characterized by a sensitivity to airborne pollen, resulting in nasal discharge, sneezing, and itchy, watery eyes. It occurs especially during late spring, late summer, and early fall and can be caused by the pollens of various plants, especially ragweed and certain trees and grasses.


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