单词	renal papilla
释义	renal papilla noun anatomy : the apex of a renal pyramid which projects into the cavity of a calyx (see calyx sense 2) of the kidney and through which collecting ducts discharge urine Word History First Known Use 1744, in the meaning defined above Medical Definition renal papilla noun : the apex of a renal pyramid which projects into the lumen of a calyx of the kidney and through which collecting ducts discharge urine
随便看	optatives opted opted (for) opted for opted in opted out optezes optezzes optic optic axis optic capsule optic chiasma optic cup optic disc optic discs optic disk optic disks optic lobe optic nerve optic orientation optic placode optic rod optic sign optic vesicle optical

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