| C3 | third cervical nerve; third cervical vertebra; third component of complement |
|---|---|
| C4 | fourth cervical nerve; fourth cervical vertebra; fourth component of complement |
| C5 | fifth cervical nerve; fifth cervical vertebra; fifth component of complement |
| C6 | sixth cervical nerve; sixth cervical vertebra; sixth component of complement |
| C7 | seventh cervical nerve; seventh cervical vertebra; seventh component of complement |
| right margin of heart | The border between the sternocostal and diaphragmatic surfaces of the heart; it is fairly well defined in fixed hearts but is rounded and indefinite in the living heart. Synonym: margo dexter cordis, right margin of heart. (05 Mar 2000) |
|---|---|
| ciliary margin of iris | The peripheral border of the iris attached to the ciliary body. Synonym: margo ciliaris iridis, ciliary margin of iris. (05 Mar 2000) |
| corneal margin | The margin of the cornea overlapped by the sclera. Synonym: limbus corneae, corneal margin, sclerocorneal junction. (05 Mar 2000) |
| cornua of falciform margin of saphenous opening | See: inferior horn of falciform margin of saphenous opening, superior horn of falciform margin of saphenous opening. (05 Mar 2000) |
| costal margin | The lower edge of the chest (thorax) formed by the bottom edge of the rib cage. (12 Dec 1998) |
| psoas margin | In abdominal radiography, the appearance of the fat stripe delineating the lateral margin of the psoas muscle shadow; shows a normal retroperitoneum when visible. (05 Mar 2000) |
| pupillary margin of iris | The inner border of the iris that forms the edge of the pupil. Synonym: margo pupillaris iridis, pupillary margin of iris. (05 Mar 2000) |
| squamous margin | Edge of a bone which articulates with the squamous part of the temporal bone. See: squamous border of parietal bone, squamous border of sphenoid bone. Synonym: margo squamosus, squamous margin. (05 Mar 2000) |
| nasal margin of frontal bone | The border of the frontal bone that articulates with the nasal bones. Synonym: margo nasalis ossis frontalis, nasal margin of frontal bone. (05 Mar 2000) |
| superior horn of falciform margin of saphenous opening | The upper part of the falciform margin of the opening in the fascia lata through which the greater saphenous vein passes. Synonym: cornu superius marginalis falciformis, Burns' falciform process, Burns' ligament, Hey's ligament. (05 Mar 2000) |
| superomedial margin | The curved margin of the cerebral hemisphere at the junction of the superolateral and medial surfaces. Synonym: margo superomedialis, superomedial margin. (05 Mar 2000) |
| supraorbital margin | The superior half of the orbital rim, which constitutes the curved superior border of the orbital opening, formed by the frontal bone. See: orbital rim. Synonym: margo supraorbitalis, supraorbital arch, supraorbital ridge. (05 Mar 2000) |
| incisal margin | The part of an anterior tooth farthest from the apex of the root. Synonym: margo incisalis, cutting edge, incisal margin, incisal surface, shearing edge. (05 Mar 2000) |
| inferior horn of falciform margin of saphenous opening | The lower part of the falciform margin of the opening in the fascia lata through which the greater saphenous vein passes. Synonym: cornu inferius marginalis falciformis hiatus sapheni. (05 Mar 2000) |
| inferior margin | The caudal or lowermost margin of a structure. Synonym: inferior margin, margo inferior. (05 Mar 2000) |