Webster's 1913 Dictionary
TETROL
Tet "rol, n. Etym: [Tetra- + benzol. ] (Chem. )
Defn: A hypothetical hydrocarbon, C4H4, analogous to benzene; -- so called from the four carbon atoms in the molecule. Tetrol phenol, furfuran. [Obs. ]
TETROLIC
TETROLIC Tet *rol "ic, a. (Chem. )
Defn: Of, pertaining to, or designating, an acid, C3H3.CO2H, of the acetylene series, homologous with propiolic acid, obtained as a white crystalline substance.