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calix ca·lix or ca·lyx (kā'lĭks, kāl'ĭks)
n. pl. ca·li·ces or ca·ly·ces (kā'lĭ-sēz', kāl'ĭ-)
A flower-shaped or funnel-shaped structure.
Any of the branches or recesses of the pelvis of the kidney into which the orifices of the malpighian renal pyramids project.