The term "sidesternal line" refers to a line running alongside the sternum. However, if you are looking for synonyms for this specific term, other expressions can be used to convey a similar meaning. For instance, you may refer to it as the "sternocostal line" or the "midclavicular line". These synonyms highlight the location of the line along the sternum. Another alternative could be the "parasternal line", emphasizing the proximity to the sternum. By employing these different terms, medical professionals and researchers can effectively communicate and identify a specific anatomical landmark during clinical examinations or scientific discussions related to chest-related conditions.