Bark louse Zool. An insect of the family Coccidæ, which infests the bark of trees and vines.
Note: ☞ The wingless females assume the shape of scales. The bark louse of the vine is Pulvinaria innumerabilis; that of the pear is Lecanium pyri. See Orange scale.
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bark louse
n : any of several insects living on the bark of plants [syn: bark-louse]