haematuria
Blood in the urine.
hamamelis
Genus of shrubs or small trees (family Hamamelidaceae), including the
witch hazels. Dried leaves of a witch hazel (Hamamelis virginiana) of
the eastern U.S. used formerly as a tonic and sedative.
hartshorn
Antler of a hart, formerly used as a source of ammonia and in smelling
salts. Ammonium carbonate.
hellebore
Plants of the genus Helleborus, native to Eurasia, most of which are
poisonous. Plants of the genus Veratrum, especially V. viride of North
America, yielding a toxic alkaloid used medicinally.
henbane (black henbane, insane root)
Poisonous Eurasian plant (Hyoscyamus niger) having an unpleasant odor,
sticky leaves, and funnel-shaped greenish-yellow flowers. It is a source
hyoscyamus, hyoscamine and scopolamine.
henna
Tree or shrub (Lawsonia inermis) of the Middle East, having fragrant
white or reddish flowers. Reddish-orange dyestuff prepared from the
dried and ground leaves of this plant, used as a cosmetic dye and for
coloring leather and fabrics. To dye (hair, for example) with henna.
Hepar
Liver of sulphur; a substance of a liver-brown color, sometimes used in
medicine. Fformed by fusing sulphur with carbonates of the alkalies
(esp. potassium), and consists essentially of alkaline sulphides. Called
also hepar sulphuris. A substance resembling hepar; in homeopathy,
calcium sulphide, called also hepar sulphuris calcareum.
hepatica (liverleaf)
Woodland plants of the genus Hepatica, especially H. americana of
eastern North America, having three-lobed leaves and white or lavender
flowers.
Herpes Zoster
Varicella-zoster virus: A herpesvirus that causes chickenpox and
shingles. Causes an acute viral infection—inflammation of the sensory
ganglia of spinal or cranial nerves and the eruption of vesicles along
the affected nerve path. It usually strikes only one side of the body
and is often accompanied by severe neuralgia.
Honduras Bark
Dried bark of a tropical American tree (Picramnia antidesma) formerly
used in the treatment of syphilis and skin diseases.