The terpolymer (2, 2’-HBDF) synthesized in the presence of acid catalyst by the condensation of 2, 2’-Dihydroxybiphenyl (2, 2’-HB) and Dithiooxamide (D) with Formaldehyde (F) using 1:1:2 molar proportions of the reacting monomers. The copolymer possesses antimicrobial activity for certain bacteria such as Staphylococcus aureus, Escherichia coli, and fungi Aspergillus niger, Candida albicans. Linear graph are found by the plots of log σ vs 103/T over a wide range of temperature, which indicate that the Wilson’s exponential law σ = σ0exp(- ΔE/kT) is obeyed. From the electrical conductivity of these copolymers, activation energies of electrical conduction have been evaluated and values lies in the range 7.1 x 10-20 to 4.5 x 10-20 J/K. On the basis of above studies, these copolymers can be ranked as semiconductors