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.
1. 'principal'. Principal can be an adjective or a noun. The principal thing or person in a group is the most important one. His principal interest in life was money. The principal character in the film was played by John Hurt. The principal of a school or college is the person in charge of it.