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What does the word meatus mean?

• A passage or channel, especially the external opening of a canal.

• Meat, from meo, meatum, " to go. " A passage or canal.

• [ Latin] A passage. M. auditorius externus, M. auditorius internus, the external and internal auditory m. See Auditory. M. of the nose, one of the three longitudinal passages into which the cavity of the nose is divided. The superior m., above the middle turbinated bone, at the back part of nasal fossae, communicates with the posterior ethmoidal cells; the Middle m., between the middle and inferior turbinated bones, communicates with the maxillary antrum, the anterior ethmoidal cells, and the frontal sinuses; the Inferior m., below the inferior turbinated bone, communicates with the nasal duct. M. nasi communis, that portion of the nasal cavity adjoining the septum and forming the common space into which the other meatuses open. M. naso-pharyngeus, that portion of the nasal cavity opening into the pharynx under the body of the sphenoid, M. urinarius, the orifice of the urethra, including the exterior orifice( M. urinarius internus).

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