Definition of musk. 1  1a : a substance with a penetrating persistent odor obtained from a sac beneath the abdominal skin of the male musk deer and used as a perfume fixative; also : a similar substance from another animal or a synthetic substituteb : the odor of musk; also : an odor resembling musk especially in heaviness or persistence.
Inferior Nasal Concha. The Inferior nasal concha is the most caudally based of the three nasal conchae. While the superior and middle nasal conchae form part of the perpendicular plate of the ethmoid bone, the inferior nasal concha is a bony structure by itself.It sits on the vertical bony plate known as the nasal septum, separating the nasal cavity into two bilateral and symmetrical anatomical caves.nferior Nasal Concha. The Inferior nasal concha is the most caudally based of the three nasal conchae. While the superior and middle nasal conchae form part of the perpendicular plate of the ethmoid bone, the inferior nasal concha is a bony structure by itself.
1 The frontal sinuses, superior to the eyes, in the frontal bone, which forms the hard part of the forehead. 2  The ethmoidal sinuses, which are formed from several discrete air cells within the ethmoid bone between the nose and the eyes.3  The sphenoidal sinuses, in the sphenoid bone. The frontal sinuses, superior to the eyes, in the frontal bone, which forms the hard part of the forehead. 2  The ethmoidal sinuses, which are formed from several discrete air cells within the ethmoid bone between the nose and the eyes. 3  The sphenoidal sinuses, in the sphenoid bone.