n (microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission; important as pathogens and for biochemical properties; taxonomy is difficult; often considered to be plants
词态变化
复数形式:bacteria
常见例句
1
a bacterium that is used to make yogurt and to supplement probiotics
2
an organism (especially a bacterium) that requires air or free oxygen for life
3
an organism (especially a bacterium) that does not require air or free oxygen to live
4
a chemical substance derivable from a mold or bacterium that can kill microorganisms and cure bacterial infections a
5
n a chemical substance derivable from a mold or bacterium that can kill microorganisms and cure bacterial infections
