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barklouse

American  
[bahrk-lous] / ˈbɑrkˌlaʊs /
Or bark louse

noun

plural

barklice
  1. any of numerous insects of the order Psocoptera that live on the bark of trees and other plants.


Etymology

Origin of barklouse

An Americanism dating back to 1835–45; bark 2 + louse