Noun | 1. | Pseudococcus - type genus of the Pseudococcidae arthropod genus - a genus of arthropods family Pseudococcidae, Pseudococcidae - scalelike insects: mealybugs citrophilous mealybug, citrophilus mealybug, Pseudococcus fragilis - destructive especially to citrus Comstock mealybug, Comstock's mealybug, Pseudococcus comstocki - Asiatic insect introduced accidentally into United States; pest on citrus and apple trees |