poison ivy

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poi·son i·vy

, poison oakpoison sumac (poy'zŏn ī'vē),
1.
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.

poison ivy

n.
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.

poison ivy

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.
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Poison ivy
Pharmacognosy A plant that is highly allergenic due to urushiol—which is also present in mango, japanese lacquer tree, cashews, as well as poison oak and poison sumac
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’

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)
2. Common name for the cutaneous eruption caused by contact with these species of Toxicodendron.

poison

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.

poison bean
sesbania spp., thermopsismontana.
berry poison
gastrolobiumparvifolium.
box poison
gastrolobiumparviflorum.
bullock poison
gastrolobiumtrilobum.
poison bush
thesiumnamaquense.
bushman's poison
poison buttercup
ranunculusscleratus.
camel poison
erythrophleumchlorostachys.
candyup poison
stypandra glauca.
Champion Bay poison
gastrolobiumoxyloboides.
clover-leaf poison
goodialotifolia.
cluster poison
gastrolobiumbennettsianum.
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.
crinkle-leaf poison
gastrolobiumvillosum.
desert poison bush
gastrolobiumgrandiflorum.
poison elder
Gilbernene poison
gastrolobiumrotundifolium.
granite poison
gastrolobiumgraniticum.
heart-leaf poison bush
gastrolobiumbilobum or G. grandiflorum.
poison hemlock
Hill River poison
gastrolobiumpolystachyum.
hook-point poison
gastrolobiumhamulosum.
horned poison
gastrolobiumpolystachyum.
Hutt River poison
gastrolobiumpropinquum.
insect poison
poison ivy
toxicodendronradicans.
kite-leaf poison
gastrolobiumlaytonii.
lamb poison
isotropiscuneifolia.
poison leaf
dichapetalumcymosum.
poison lobelia
lobeliapratioides.
mallet poison
gastrolobiumdensifolium.
marlock poison
gastrolobiumparviflorum.
poison morning glory
ipomoeamuelleri.
narrow-leaf poison
gastrolobiumstenophyllum.
net-leaf poison
gastrolobiumracemosum.
poison oak
toxicodendrondiversilobum, T. quercifolium.
poison onion
dipcadiglaucum.
pea-blossom poison
poison peach
trematomentosa. Called also peach-leaf poison bush.
poison pimelea
pimeleapauciflora.
poison pod albizia
albiziaversicolor.
prickly poison
gastrolobiumspinosum.
rigid-leaf poison
gastrolobiumrigidum.
river poison
gastrolobiumforrestii.
river poison tree
excoecariadallachyana.
rock poison
gastrolobiumcallistachys.
Roe's poison
gastrolobiumspectabile.
round-leaf poison
gastrolobiumpycnostachyum.
runner poison
gastrolobiumovalifolium.
poison sage
isotropisatropurpurea.
sandplain poison
gastrolobiummicrocarpum.
scale-leaf poison
gastrolobiumappressum.
poison sedge
schoenusasperocarpus.
slender poison
gastrolobiumheterophyllum.
slender lamb poison
isotropisjuncea.
spike poison
gastrolobiumglaucum.
Stirling Range poison
gastrolobiumvelutinum.
poison suckleya
poison sumac
thick-leaf poison
gastrolobiumcrassifolium.
poison vetch
wallflower poison
gastrolobiumgrandiflorum.
wodjil poison
gastrolobiumfloribundum.
woolly poison
gastrolobiumtomentosum.
York Road poison
gastrolobiumcalycinum.