antidiuretic

adjective
an·​ti·​di·​uret·​ic | \ -ˈret-ik \

Medical Definition of antidiuretic

 (Entry 1 of 2)

: tending to oppose or check excretion of urine

antidiuretic

noun

Medical Definition of antidiuretic (Entry 2 of 2)

: an antidiuretic substance

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