Located on or relating to the outside of the body cavity or situated externally relative to the coelom.
From Greek 'ekto-' (outside) and 'koilos' (cavity, referring to the coelom), with '-ic' suffix describing external anatomical positioning.
Ectocoelic is the anatomical opposite of endocoelic—knowing which side of the body cavity something lives on is crucial for surgeons and can mean the difference between a routine operation and a surprise complication.
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