/buy'oh flay"veuh noyd'/ , n. Biochem.
any of a group of water-soluble yellow compounds, present in citrus fruits, rose hips, and other plants, that in mammals maintain the resistance of capillary walls to permeation and change of pressure. Also called citrin, vitamin P .
[ 1950-55; BIO- + flavonoid any derivative of flavone (FLAVONE + -OID) ]