Definitions

1. noun

a family of small, soft-bodied insects, typically plant-sucking, with piercing-sucking mouthparts and usually winged, that are often found in large colonies on plants, especially aphids, mealybugs, and whiteflies

“The entomologist specialized in the study of aphididae and their impact on agriculture.”

2. plural noun

all members of the family Aphididae

“The aphididae were found on every plant in the garden, feeding on the sap.”