NA: acronym for NAsion; a cephalometric landmark located where the intranasal and nasofrontal sutures meet nano·me·ter : unit of length to measure the wavelength of light. It is equivalent to 1 x 10-9 M or 10 angstroms. 1 nm=1/1,000,000 mm narrative report : a complete description of the clinical findings, diagnosis, and treatment rendered for a given patient nasal […]