According to MedicineNet.com, the
1. a hollow or space, or a potential space, within the body or one of its organs; called also caverna and cavum. 2. the lesion produced by dental caries. Cavities ...
the vaulted chamber that lies between the floor of the cranium and the roof of the mouth of higher vertebrates extending from the external nares to the pharynx, ...
Just as optical things relate to the eyes, nasal things relate to the nose. Your
nostrils lead to your
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