1. a lip or liplike structure, especially in anatomy or biology
Usage: technical; anatomy
2. the lower lip of an insect’s mouth
Usage: entomology

Examples

• The botanist examined the labium of the orchid flower.
• In entomology, the labium helps insects manipulate food.
• The anatomist pointed out the labium in the dissection.
• Each insect species has a distinctly shaped labium.
• The labium serves as a protective covering for the mouth parts.
• Students learned to identify the labium under the microscope.