costal margin

(redirected from arcus costarum)

costal margin

[TA]
that portion of the inferior aperture of the thorax formed by the articulated cartilages of the seventh to tenth (that is, false) ribs.
Synonym(s): arcus costalis [TA], costal arch ☆ , arcus costarum
Farlex Partner Medical Dictionary © Farlex 2012

costal margin

The lower (abdominal) border of the front of the rib cage formed by the costal cartilages of ribs 7 to 10.
See also: margin
Medical Dictionary, © 2009 Farlex and Partners