| bacteria | | |
| n. (animal) | 1. bacteria, bacterium | (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. |
| ~ immune reaction, immune response, immunologic response | a bodily defense reaction that recognizes an invading substance (an antigen: such as a virus or fungus or bacteria or transplanted organ) and produces antibodies specific against that antigen. |
| ~ bioremediation | the act of treating waste or pollutants by the use of microorganisms (as bacteria) that can break down the undesirable substances. |
| ~ micro-organism, microorganism | any organism of microscopic size. |
| ~ acidophil, acidophile | an organism that thrives in a relatively acid environment. |
| ~ probiotic, probiotic bacterium, probiotic flora, probiotic microflora | a beneficial bacterium found in the intestinal tract of healthy mammals; often considered to be a plant. |
| ~ bacteroid | a rodlike bacterium (especially any of the rod-shaped or branched bacteria in the root nodules of nitrogen-fixing plants). |
| ~ eubacteria, eubacterium, true bacteria | a large group of bacteria having rigid cell walls; motile types have flagella. |
| ~ calymmatobacterium, genus calymmatobacterium | a genus of bacterial rods containing only the one species that causes granuloma inguinale. |
| ~ francisella, genus francisella | a genus of Gram-negative aerobic bacteria that occur as pathogens and parasite in many animals (including humans). |
| ~ gonococcus, neisseria gonorrhoeae | the pus-producing bacterium that causes gonorrhea. |
| ~ legionella, legionella pneumophilia | the motile aerobic rod-shaped Gram-negative bacterium that thrives in central heating and air conditioning systems and can cause Legionnaires' disease. |
| ~ nitrobacterium | any of the bacteria in the soil that take part in the nitrogen cycle; they oxidize ammonium compounds into nitrites or oxidize nitrites into nitrates. |
| ~ penicillin-resistant bacteria | bacteria that are unaffected by penicillin. |
| ~ pus-forming bacteria | bacteria that produce pus. |
| ~ rod | any rod-shaped bacterium. |
| ~ diplococcus | Gram-positive bacteria usually occurring in pairs. |
| ~ superbug | a strain of bacteria that is resistant to all antibiotics. |
| ~ resistance | the degree of unresponsiveness of a disease-causing microorganism to antibiotics or other drugs (as in penicillin-resistant bacteria). |
| ~ microphage | a neutrophil that ingests small things (as bacteria). |
| ~ microbiology | the branch of biology that studies microorganisms and their effects on humans. |
| ~ peritrichous | covered all over with uniformly distributed flagella. |
| ~ gram-positive | (of bacteria) being or relating to a bacterium that retains the violet stain used in Gram's method. |
| ~ gram-negative | (of bacteria) being of or relating to a bacterium that does not retain the violet stain used in Gram's method. |
| bacterium | | |
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