The Collaborative International Dictionary of English v.0.48:
Bacteriological \Bac*te"ri*o*log`ic*al\ (b[a^]k*t[=e]`r[i^]*[-o]*l[o^]j"[i^]*kal), a. Of or pertaining to bacteriology; as, bacteriological studies. [1913 Webster]WordNet (r) 3.0 (2006):
bacteriological adj 1: of or relating to bacteriology [syn: bacteriological, bacteriologic]