Diluent \Dil"u*ent\, a. [L. diluens, p. pr. diluere. See {Dilute}.] Diluting; making thinner or weaker by admixture, esp. of water. --Arbuthnot. [1913 Webster]
Diluent \Dil"u*ent\, n. 1. That which dilutes. [1913 Webster] 2. (Med.) An agent used for effecting dilution of the blood; a weak drink. [1913 Webster] There is no real diluent but water. --Arbuthnot. [1913 Webster]