antennule
/ænˈtɛn.jul/
noun
- A small antenna, especially one of the first pair of antennae in crustaceans like shrimp and lobsters.
- Under the microscope, the antennule of the crab showed tiny sensory hairs.
- The shrimp used its antennule to sense chemicals in the water.
- Biologists studied how the lobster's antennule helps it find food.