any of a family (Phylloxeridae) of homopteran insects that attack the leaves and roots of certain plants, including grapevines
See phylloxera in American Heritage Dictionary 4
(fĭlˌŏk-sîrˈə, fĭ-lŏkˈsər-ə)
nounpl.phyl·lox·e·rae(-rē)
Any of several small insects of the genus Phylloxera that are related to aphids, especially P. vitifoliae, a widely distributed species very destructive to grape crops.