colpostat

Appliance for use in the vagina, such as a radium applicator, for treatment of cancer of the cervix. [colpo- + G. statos, standing]

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col·po·stat 'käl-pə-.stat n a medical appliance or instrument (as a radium applicator) designed to facilitate vaginal treatment

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col·po·stat (kolґpo-stat) [colpo- + -stat] an appliance for retaining something, such as radium, in the vagina.