Definition of "labium"

(anatomy, usually in the plural) A liplike structure; especially one of the two pairs of folds of skin on either side of the vulva.  examples

(botany) The lip of a labiate corolla.  examples

(entomology) A lower mouthpart of an insect that is formed by the second pair of maxillae united in the middle line.

1. (zoology) A liplike part of various invertebrates.

(music) The lip against which pressured air is driven to produce sound in a recorder and in a pipe organ with flue pipes.  examples