ci·troph·i·lus mealybug noun alsoci·troph·i·lous mealybug\sə̇.ˈträfələs-\ Etymology:citrophilus from New Latin, from citr- + -philus; citrophilous alteration (influenced by -philous) of citrophilus : a mealybug (Pseudococcus fragilis) especially destructive to citrus