Systemic symptoms are most often absent in acne vulgaris. Severe acne with associated systemic signs and symptoms, such as fever, is referred to as acne fulminans. Severe acne, characterized by multiple comedones, without the presence of systemic symptoms, is known as acne conglobata.cne vulgaris is a common chronic skin disease involving blockage and/or inflammation of pilosebaceous units (hair follicles and their accompanying sebaceous gland). Acne can present as noninflammatory lesions, inflammatory lesions, or a mixture of both, affecting mostly the face but also the back and chest.
The perimeter is defined as the distance around the outside edge of a two-dimensional shape. The perimeter of a circle or an ellipse is referred to as the circumference. The word perimeter comes from the Greek word peri, which means around, and the Greek word meter, which means measure.. The perimeter can also be easily defined as the outline of an object.
â¢ RADIUS (noun). The noun RADIUS has 5 senses: 1. the length of a line segment between the center and circumference of a circle or sphere. 2. a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere).3. a circular region whose area is indicated by the length of its radius.4. the outer and slightly shorter of the two bones of the human forearm. 5. support consisting of a radial member of a wheel joining the hub to the rim. Familiarity information: RADIUS used as a noun is common.. a circular region whose area is indicated by the length of its radius. 4. the outer and slightly shorter of the two bones of the human forearm. 5. support consisting of a radial member of a wheel joining the hub to the rim.