labium

(bē əm)

noun pl. labia

a lip or liplike organ; esp.,
  1. the lower, liplike part of the corolla of certain flowers
  2. the lower lip of an insect, formed by the fusion of the second maxillae

Origin: L, lip

See labium in American Heritage Dictionary 4

noun pl. la·bi·a (-bē-ə)
  1. Anatomy Any of four folds of tissue of the female external genitalia.
  2. 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.
  3. Botany One of the liplike divisions of a labiate corolla.

Origin:

Origin: Latin, lip; see leb- in Indo-European roots

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