There is no special medical term meaning obscured by overlying osseous structures. The phrase means that something can't be seen well because of the bones between the structure of interest and the viewer.
The medical term for appendages or accessory structures of an organ is "adnexa".
Integumentary
AdnexaAdnexaAdnexa
fibers
Metabolism.
Undifferentiated means lacking structures typical in mature cells.
An adhesion is a fibrous band holding structures together abnormally.
echoencephalography
iritis
The medical term for the study of the function of the structures of hearing is "audiology." Audiologists are healthcare professionals who specialize in diagnosing and treating disorders related to hearing and balance.
Ciliary means pertaining to cilia, hairlike structures in the body.
The medical term is "pontocerebellar," which refers to structures or processes involving both the cerebellum and the pons in the brain.