attenuant

At*ten"u*ant, a. Etym: [L. attenuans, p. pr. of attenuare: cf. F. atténuant. See Attenuate.] Defn: Making thin, as fluids; diluting; rendering less dense and viscid; diluent. -- n. (Med.) Defn: A medicine that thins or dilutes the fluids; a diluent.

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