TREE n.
of ducks belonging to Dendrocygna and allied genera. These ducks have a long and slender neck and a long hind toe. They are arboreal in their habits, and are found in the tropical parts of America, Africa, Asia, and Australia. -- Tree fern (Bot.), an arborescent fern having a straight trunk, sometimes twenty or twent…
VENOUS a.
nous hum (Med.), a humming sound, or bruit, heard during auscultation of the veins of the neck in anæmia. -- Venous pulse (Physiol.), the pulse, or rhythmic contraction, sometimes seen in a vein, as in the neck, when there is an obstruction to the passage of blood from the auricles to the ventricles, or when there is…