A cyst or cavity filled with or containing chyle, or a sac-like structure that holds chyle in the body.
From Greek 'chylos' (chyle) + 'cyst' (bladder/sac). This term specifically denotes chyle-containing cysts in medical contexts.
The cisterna chyli—the reservoir where chyle collects in your body before entering the bloodstream—could almost be called a natural 'chylocyst,' though usually the term indicates a pathological condition!
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