Nasal a. : Of or pertaining to the nose.

Nasal a. : Having a quality imparted by means of the nose; and specifically, made by lowering the soft palate, in some cases with closure of the oral passage, the voice thus issuing (wholly or partially) through the nose, as in the consonants m, n, ng (see Guide to Pronunciation, // 20, 208); characterized by resonance in the nasal passage; as, a nasal vowel; a nasal utterance.

Nasal n. : An elementary sound which is uttered through the nose, or through both the nose and the mouth simultaneously.

Nasal n. : A medicine that operates through the nose; an errhine.

Nasal n. : Part of a helmet projecting to protect the nose; a nose guard.

Nasal n. : One of the nasal bones.

Nasal n. : A plate, or scale, on the nose of a fish, etc.

Example:
What causes Nasal cavity cancerr and what should i do do minimize the chance of having it?

Taxonomy
nasal cavity, nose, segment, branches, free encyclopedia, nasal cavities, respiratory, olfactory, Blood supply, particulate matter, pharynx, passages, Innervation, Diseases, conchae, dust, turbinates, Head and neck.

Defination from the web:
nasal cavities conditions the air to be received by the areas of the respiratory tract and noses. Owing to the large surface area provided by the conchae, the air passing through the nasal cavity is warmed or cooled to within 1 degree of body temperature. ...