a lip or liplike organ; esp.,
- the lower, liplike part of the corolla of certain flowers
- the lower lip of an insect, formed by the fusion of the second maxillae
Origin of labiumL, lip
- Anatomy Any of four folds of tissue of the female external genitals.
- Zoology a. A liplike structure, such as that forming the floor of the mouth of certain invertebrates, especially insects.b. The inner margin of the opening of a gastropod shell.
- Botany One of the liplike divisions of a bilabiate corolla.
Origin of labiumLatin, lip; see leb- in Indo-European roots.
From Latin labium (“lip”).