The throat of a calyx, corolla, etc.
That portion of the interior of a spiral shell which can be seen by looking into the aperture.
The narrow passage from the mouth to the pharynx, situated between the soft palate and the base of the tongue.
The lip of a labiate corolla.
A liplike structure; especially one of the two pairs of folds of skin on either side of the vulva.
A liplike part of various invertebrates.
The lip against which pressured air is driven to produce sound in a recorder and in a pipe organ with flue pipes.
A lower mouthpart of an insect that is formed by the second pair of maxillae united in the middle line.