vitamin P

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vi·ta·min P

a mixture of bioflavonoids extracted from plants (especially citrus fruits). It reduces the permeability and fragility of capillaries and is useful in the treatment of certain cases of purpura that are resistant to vitamin C therapy.
See also: hesperidin, quercetin, rutin.

vitamin P

n.
A water-soluble vitamin, found as a crystalline substance especially in citrus juices, that functions as a bioflavonoid in promoting capillary resistance to hemorrhaging.

vitamin P

vitamin P

(1) Citrin, a mixture of bioflavinoids derived from citrus fruits. 
(2) Bioflavonoid.

vitamin P

mix of bioflavinoids extracted from citrus fruits; reduce capillary fragility/permeability

vitamin P,

n See niacin.

vi·ta·min P

(vītă-min)
Mixture of plant bioflavonoids (especially citrus fruits); reduces permeability and fragility of capillaries and is useful in treatment of some cases of purpura that are resistant to vitamin C therapy.