A basinasal line refers to an imaginary straight line that connects the base of the nose with the tip of the nose. This line is useful in assessing facial aesthetics and defining the position of nose structures. There are a few synonyms that can be used to describe this line. Some alternatives include the nasal base line, infranasal line, or columellar transverse line. These terms are all used interchangeably in the medical and aesthetic industries. The basinasal line serves as a crucial reference point when evaluating nasal proportions and harmony, ultimately aiding in determining appropriate treatments and surgeries to enhance facial aesthetics.