Latus (anatomy)

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Latus (anatomy)
Surface lines of the front of the thorax and abdomen. (Latus labeled as "lumbar".)
Latin regio lateralis
Anatomical terminology

In anatomy, a latus (plural latera) is a region of the abdomen between the hypochondrium and the iliac region on each side of the body (left and right). In some contexts, it is called the flank or lumbar region.

The word came to medical English from Latin; it means "side". The adjectival forms, lateral or lateralis, also have a much broader (and more common) sense referring to the left and right sides of the body generally.