'Lecanium pyri' definitions:

Definition of 'Lecanium pyri'

From: GCIDE

Bark louse \Bark" louse`\ (Zool.) An insect of the family Coccid[ae], which infests the bark of trees and vines. [1913 Webster]
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}. [1913 Webster]