Phyl`lox*e"ra(?), n. [NL., fr. Gr. leaf + dry.] 1. (Zol.) A small hemipterous insect (Phylloxera vastatrix) allied to the aphids. It attacks the roots and leaves of the grapevine, doing great damage, especially in Europe.
It exists in several forms, some of which are winged, other wingless. One form produces galls on the leaves and twigs, another affects the roots, causing galls or swellings, and often killing the vine.
2. The diseased condition of a vine caused by the insect just described.
Phy*log"e*ny(?), } n. [Gr. tribe + E. genesis, or root of Gr. gi`gnesqai to be born.] The history of genealogical development; the race history of an animal or vegetable type; the historic exolution of the phylon or tribe, in distinction from ontogeny, or the development of the individual organism, and from biogenesis, or life development generally.
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Wed 12th December 2018