Search the Dictionary

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.

Root louse (Zoöl.), any plant louse, or aphid, which lives on the roots of plants, as the Phylloxera of the grapevine. See Phylloxera. -- Root of an equation (Alg.), that value which, substituted for the unknown quantity in an equation, satisfies the equation. -- Root of a nail (Anat.), the part of a nail which is co…

ich resembles a seed, formed, on the leaves of various plants, usually by some species of Phylloxera. -- Seed leaf (Bot.), a cotyledon. -- Seed lobe (Bot.), a cotyledon; a seed leaf. -- Seed oil, oil expressed from the seeds of plants. -- Seed oyster, a young oyster, especially when of a size suitable for transplan…

væ feed on the leaves of the grapevine. -- Vine fretter (Zoöl.), a plant louse, esp. the phylloxera that injuries the grapevine. -- Vine grub (Zoöl.), any one of numerous species of insect larvæ that are injurious to the grapevine. -- Vine hopper (Zoöl.), any one of several species of leaf hoppers which suck the sap…