Corresponds to the anterior. (Costomediastinal) line of pleural reflection. 2. It is deeply notched in the left lung posterior. to 5th costal cartilage by the pericardium costal cartilage by the pericardium. and extends vertically downwards to form. Lingula.
Generally speaking, a principle is a rule, standard, or belief of one kind or another. As an adjective, principal means âmost importantâ, while a principal is â generally speaking â a person who is most important in a particular organization or group.
n. 1. a standard or rule of personal conduct: a man of principle. 2. (often plural) a set of such moral rules: he'd stoop to anything; he has no principles. 3. adherence to such a moral code; morality: it's not the money but the principle of the thing; torn between principle and expediency.