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the slight groove in the external abdominal wall parallel to the lateral edge of the rectus sheath.
the slightly curved line on the ventral abdominal wall, approximately parallel to the median line and lying about halfway between the median line and the side of the body. It marks the lateral border of the rectus abdominis and is visible as a shallow groove when that muscle is tensed. Compare linea alba.
lin·e·a sem·i·lu·na·ris(lin'ē-ă sem-ē-lū-nā'ris) [TA]
Spigelius,Adrian (van der Spieghel), Flemish anatomist in Padua, 1578-1625.
spigelian hernia - abdominal hernia through the semilunar line. Synonym(s): lateral ventral hernia
Spigelius line - the slight groove in the external abdominal wall parallel to the lateral edge of the rectus sheath. Synonym(s): linea semilunaris
Spigelius lobe - a small lobe of the liver situated posteriorly between the sulcus for the vena cava and the fissure for the ligamentum venosum. Synonym(s): lobus caudatus