costal margin

(redirected from arcus costalis)

that portion of the inferior aperture of the thorax formed by the articulated cartilages of the seventh to tenth (that is, false) ribs.

The lower (abdominal) border of the front of the rib cage formed by the costal cartilages of ribs 7 to 10.

See also: margin

References in periodicals archive ?

Second-degree (10%) burn from the arcus costalis bilaterally to the level of the umbilicus and on the front of both legs was observed.

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