poison ivy(redirected from poison ivies)
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poi·son i·vy, poison oakpoison sumac (poy'zŏn ī'vē),
2. Common name for the cutaneous eruption (Rhus dermatitis) caused by contact with these species of Toxicodendron.
poison ivy/poi·son ivy/ (poiz´'n i´ve) Rhus radicans.
1. A North American shrub or vine (Toxicodendron radicans) that has compound leaves with three leaflets, small green flowers, and whitish berries and that causes a rash on contact.
2. A skin rash caused by contact with this plant. In both senses also called poison oak.
any of several species of climbing vine of the genus Rhus, characterized by shiny three-pointed leaves. It is common in North America and causes severe allergic contact dermatitis in many people. Localized vesicular eruption with itching and burning results and may be treated with antipruritic lotions, cool compresses, or topical corticosteroid ointment or cream. Severe cases may require corticosteroids given intramuscularly or orally. See also rhus dermatitis, urushiol.
Common urushiol-rich plants Poison ivy (Toxicodendron radicans, eastern US) poison oak (T diversilobium or Rhus diversiloba, western US), poison sumac (T vernix, southern US)
Public health A popular term for any allergic reaction or dermatopathy caused by T radicans, as in ‘Bob has poison ivy’
1. A plant that is highly allergenic due to urushiol, which is also found in mango, japanese lacquer tree, cashews; common urushiol-rich plants: poison ivy–Toxicodendron radicans, eastern US, poison oak–T diversilobium or Rhus diversiloba, western US; poison sumac–T vernix, southern US. See Urushiol.
2. A popular term for any allergic reaction or dermatopathy caused by T radicans.
poi·son i·vy, poison oak , poison sumac (poy'zŏn ī'vē, ōk, sūmak)
1. See: Toxicodendron
2. Common name for the cutaneous eruption caused by contact with these species of Toxicodendron.
a substance that, on ingestion, inhalation, absorption, application, injection or development within the body, in relatively small amounts, may cause structural damage or functional disturbance.
Corrosives are poisons that destroy tissues directly. They include the mineral acids, such as nitric acid, sulfuric acid and hydrochloric acid, and the caustic alkalis, such as ammonia, sodium hydroxide (lye), sodium carbonate and sodium hypochlorite; and carbolic acid (phenol).
Irritants are poisons that inflame the mucous membranes by direct action. These include copper sulfate, salts of lead, cantharidin, oxalate raphides, and many plant and insect poisons.
Nerve toxins act on the nerves or affect some of the basic cell processes. This large group includes the narcotics, such as opium, heroin and cocaine, and the barbiturates, anesthetics and alcohols.
Blood toxins act on the blood and deprive it of oxygen. They include carbon monoxide, carbon dioxide, hydrocyanic acid and the gases used in chemical warfare. Some blood toxins destroy the blood cells or the platelets.
See also poisoning and names of individual poisons.
Champion Bay poison
poison Control Center
public facility set up to provide information around the clock to provide information on toxicity of substances and current information of correct first aid methods and antidotes for poisoning emergencies.
desert poison bush
heart-leaf poison bush
gastrolobiumbilobum or G. grandiflorum.
Hill River poison
Hutt River poison
poison morning glory
toxicodendrondiversilobum, T. quercifolium.
trematomentosa. Called also peach-leaf poison bush.
poison pod albizia
river poison tree
slender lamb poison
Stirling Range poison
York Road poison