Definitions for "microbial"
Of, pertaining to, or caused by, microbes; as, microbial growth; the microbian theory; a microbian disease.
like something that can only be seen with a microscope.
Microbial means of or relating to microbes (microscopic organisms such as bacteria or viruses).
Keywords:  microorgansim, see
see microorgansim.
Keywords:  warfare, involving, caused
of or involving or caused by or being microbes; "microbial warfare"
minute forms of life such as bacteria, fungi or viruses.
Minute living being.