- abdominothoracic arch
- the lower boundary of the anterior aspect of the thorax.
Medical dictionary. 2011.
Medical dictionary. 2011.
arch — Any structure resembling a bent bow or an a.; an arc. In anatomy, any vaulted or archlike structure. See arcus. SYN: arcus [TA]. [thru O. Fr. fr. L. arcus, bow] abdominothoracic a. a bell shaped line defined by the lower end of the sternum and… … Medical dictionary