See Also: claw 2, verb(dictionary)
Arthus, Nicolas(medicine)
Arthus phenomenon(medicine)
Arthus reaction(medicine)
Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
arthus-type reaction's(medicine)
claw(medicine)
claw(1)(dictionary)
dew-claw(dictionary)
claw(2)(dictionary)

Arthus phenomenon (medicine) and claw 2, verb (oh)


Arthus phenomenon (medicine)


Arthus phenomenon


A form of immediate hypersensitivity resulting in erythema, oedema, haemorrhage, and necrosis observed in rabbits after injection of antigen to which the animal has already been sensitised and has specific IgG antibodies. The reaction is caused by the inflammation that results from the deposition of antigen-antibody complexes in tissue spaces and in blood vessel walls that activate complement, most of the damage seemingly being due to the polymorphonuclear leukocytes that phagocytise the deposits and release lysosomal enzymes. The phenomenon, described by Arthus, was in rabbits, but similar reactions (Arthus-type reactions) are observed in guinea pigs, rats, and dogs, as well as in humans.

See: Arthus reaction.

Synonym: Arthus reaction.


claw 2, verb (oh)



2 v [I and T]
to tear or pull at something, using claws or your fingers
claw at
::The cat keeps clawing at the rug.
::Mary clawed at her husband's sleeve, trying to stop him.
claw your way
to try very hard to reach a place or position, using a lot of effort and determination
claw your way up/along/back etc
::He clawed his way forward inch by inch.
::Benson clawed his way back into the lead.
claw back [claw sth ¡û¡ú back] phr v
to get back something that you had lost, by trying very hard
::The company has managed to claw back its share of the market.
BrE if a government or organization claws back money it has given to people, it takes it back