| antibacterial | (noun) any drug that destroys bacteria or inhibits their growth | Synonyms: antibacterial drug, bactericide |
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| archaebacteria | (noun) considered ancient life forms that evolved separately from bacteria and blue-green algae | Synonyms: archaebacterium, archaeobacteria, archeobacteria |
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| archaebacterium | (noun) considered ancient life forms that evolved separately from bacteria and blue-green algae | Synonyms: archaebacteria, archaeobacteria, archeobacteria |
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| archaeobacteria | (noun) considered ancient life forms that evolved separately from bacteria and blue-green algae | Synonyms: archaebacteria, archaebacterium, archeobacteria |
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| archeobacteria | (noun) considered ancient life forms that evolved separately from bacteria and blue-green algae | Synonyms: archaebacteria, archaebacterium, archaeobacteria |
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| bacteremia | (noun) transient presence of bacteria (or other microorganisms) in the blood | Synonyms: bacteriaemia, bacteriemia |
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| bacteria | (noun) (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 | Synonyms: bacterium |
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| bacteriacide | (noun) any chemical agent that destroys bacteria | Synonyms: bactericide |
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| bacteriaemia | (noun) transient presence of bacteria (or other microorganisms) in the blood | Synonyms: bacteremia, bacteriemia |
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| bactericide | (noun) any drug that destroys bacteria or inhibits their growth | Synonyms: antibacterial, antibacterial drug |
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| (noun) any chemical agent that destroys bacteria | Synonyms: bacteriacide |
| bacteriemia | (noun) transient presence of bacteria (or other microorganisms) in the blood | Synonyms: bacteremia, bacteriaemia |
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| bacteriochlorophyll | (noun) a substance in photosensitive bacteria that is related to but different from chlorophyll of higher plants | - |
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| bacteriologist | (noun) a biologist who studies bacteria | - |
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| bacteriology | (noun) the branch of medical science that studies bacteria in relation to disease | - |
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| bacteriolysis | (noun) dissolution or destruction of bacteria | - |
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| bacteriophage | (noun) a virus that is parasitic (reproduces itself) in bacteria | Synonyms: phage |
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| bacteriostasis | (noun) inhibition of the growth of bacteria | - |
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| bacteriostat | (noun) a chemical or biological material that inhibits bacterial growth | - |
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| bacterium | (noun) (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 | Synonyms: bacteria |
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| bacteroid | (noun) a rodlike bacterium (especially any of the rod-shaped or branched bacteria in the root nodules of nitrogen-fixing plants) | - |
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| corynebacterium | (noun) any species of the genus Corynebacterium | - |
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| cyanobacteria | (noun) predominantly photosynthetic prokaryotic organisms containing a blue pigment in addition to chlorophyll; occur singly or in colonies in diverse habitats; important as phytoplankton | Synonyms: blue-green algae |
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| enterobacteria | (noun) rod-shaped Gram-negative bacteria; most occur normally or pathogenically in intestines of humans and other animals | Synonyms: enteric bacteria, enterics, entric |
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| eubacteria | (noun) a large group of bacteria having rigid cell walls; motile types have flagella | Synonyms: eubacterium, true bacteria |
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| eubacterium | (noun) a large group of bacteria having rigid cell walls; motile types have flagella | Synonyms: eubacteria, true bacteria |
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| halobacter | (noun) halophiles in saline environments such as the Dead Sea or salt flats | Synonyms: halobacteria, halobacterium |
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| halobacteria | (noun) halophiles in saline environments such as the Dead Sea or salt flats | Synonyms: halobacter, halobacterium |
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| halobacterium | (noun) halophiles in saline environments such as the Dead Sea or salt flats | Synonyms: halobacter, halobacteria |
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| mycobacteria | (noun) rod-shaped bacteria some saprophytic or causing diseases | Synonyms: mycobacterium |
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| mycobacterium | (noun) rod-shaped bacteria some saprophytic or causing diseases | Synonyms: mycobacteria |
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| myxobacter | (noun) bacteria that form colonies in self-produced slime; inhabit moist soils or decaying plant matter or animal waste | Synonyms: gliding bacteria, myxobacteria, myxobacterium, slime bacteria |
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| myxobacteria | (noun) bacteria that form colonies in self-produced slime; inhabit moist soils or decaying plant matter or animal waste | Synonyms: gliding bacteria, myxobacter, myxobacterium, slime bacteria |
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| myxobacterium | (noun) bacteria that form colonies in self-produced slime; inhabit moist soils or decaying plant matter or animal waste | Synonyms: gliding bacteria, myxobacter, myxobacteria, slime bacteria |
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| nitrobacteria | (noun) soil bacteria that convert nitrites to nitrates | Synonyms: nitric bacteria |
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| nitrobacterium | (noun) 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 | - |
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| nitrosobacteria | (noun) soil bacteria that oxidize ammonia to nitrites | Synonyms: nitrous bacteria |
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| thiobacteria | (noun) any bacterium of the genus Thiobacillus | Synonyms: sulfur bacteria, sulphur bacteria |
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