| costal fringe | An irregularly disposed collection of visible veins seen in the skin of people usually of or past middle age; it has no specific connection with any deep structure, such as the diaphragm, and no necessary connection with underlying visceral disease. Synonym: zona corona. (05 Mar 2000) |
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| costal groove | A groove in the lower inner border of the rib, lodging the intercostal vessels and nerve. Synonym: sulcus costae, subcostal groove. (05 Mar 2000) |
| costal groove for subclavian artery | <anatomy, artery> A groove immediately posterior to the scalene tubercle on the upper surface of the first rib across which the subclavian artery passes. Synonym: sulcus costae arteriae subclaviae. (05 Mar 2000) |
| costal margin | The lower edge of the chest (thorax) formed by the bottom edge of the rib cage. (12 Dec 1998) |
| costal notch | One of the notches or facets on the lateral edge of the sternum for articulation with a costal cartilage. Synonym: incisura costalis. (05 Mar 2000) |
| costal part of diaphragm | The part of the diaphragm that arises from the inner aspect of the lower six costal cartilages and the lower four ribs and inserts on the anterolateral part of the central tendon. Synonym: pars costalis diaphragmatis. (05 Mar 2000) |
| costal pit of transverse process | A facet on the transverse process of a vertebra for articulation with the tubercle of a rib. Synonym: fovea costalis processus transversi, costal pit of transverse process. (05 Mar 2000) |
| costal pleura | The layer of parietal pleura lining the chest walls. Synonym: pleura costalis. (05 Mar 2000) |
| costal pleurisy | Inflammation of the pleura lining the thoracic walls. (05 Mar 2000) |
| costal process | An apophysis extending laterally from the transverse process of a lumbar vertebra; it is the homologue of the rib. Synonym: processus costalis. (05 Mar 2000) |
| costal respiration | Respiration effected chiefly by the action of the intercostal and other muscles that raise the ribs, causing expansion of the chest. Synonym: costal respiration. (05 Mar 2000) |
| costal surface | The surface of certain structures that face the ribs; they are the lungs and the scapula. Synonym: facies costalis. (05 Mar 2000) |
| costal surface of lung | The surface of each lung that lies in contact with the costal pleura. Synonym: facies costalis pulmonis. (05 Mar 2000) |
| costal surface of scapula | The concave aspect of the body of the scapula that faces the thorax and that principally lodges the subscapularis muscle. Synonym: facies costalis scapulae. (05 Mar 2000) |
| costal tuberosity | <anatomy> An irregular pitted area on the inferior surface of the clavicle at its sternal end, giving attachment to the costoclavicular ligament. Synonym: impressio ligamenti costoclavicularis, costal tuberosity, rhomboid impression, tuberositas costalis. (05 Mar 2000) |