scale insect
noun
1- a small bug with a protective shield-like scale. It spends most of its life attached by its mouth to a single plant, sometimes occurring in such large numbers that it becomes a serious pest.介壳虫。
1.1
- Superfamily Coccoidea, suborder Homoptera: several families, in particular Coccidae.蚧总科, 同翅亚目：数科, 尤指介壳虫科。