cornicle
/ˈkɔːrnɪkəl/
noun
- A small, tube-like structure on the abdomen of an aphid that secretes a waxy or defensive fluid.
- The aphid raised its cornicle to release a drop of waxy fluid.
- Scientists study the cornicle to understand how aphids defend themselves.
- Each cornicle on the insect's back produces a sticky substance.