Chem. [f. TRI- 5 + Gr. ὑδρο-, combining form of ὔδωρ water: see HYDRO-.] A formative denoting that the compound contains the elements of three molecules of water, H2O, united to the substance designated by the rest of the name; e.g., trihydrostrychnine, C21H28N2O5, which differs from strychnine, C21H22N2O2, by 3H2O.
1879. Jrnl. Chem. Soc., XXXVI. 387. Another basic substance was obtained, trihydrostrychnine.
