Relating to or located at both the rib level and the lower or inferior direction in anatomical position.
From Latin 'costa' (rib) combined with 'inferior' from Latin 'inferus' (below, lower). This anatomical directional term combines a specific anatomical structure (ribs) with a spatial direction (downward), precisely pinpointing locations in medical imaging or surgery.
Anatomists use directional words like 'costoinferior' as a universal language—a costoinferior finding on an X-ray means the same thing whether the patient is from Tokyo or Toronto, making medicine truly international.
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