Definition of bacteria noun from the Oxford Advanced Learner's Dictionary

  

bacteria

 noun
noun
BrE BrE//bækˈtɪər//
 
; NAmE NAmE//bækˈtɪr//
 
[plural](bacterium
BrE BrE//bækˈtɪəriəm//
 
; NAmE NAmE//bækˈtɪriəm//
 
)
 
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the simplest and smallest forms of life. Bacteria exist in large numbers in air, water and soil, and also in living and dead creatures and plants, and are often a cause of disease Neither chilling nor freezing kills all bacteria. Wordfinderbacteria, disease, epidemic, fever, illness, immunity, infection, spread, vaccinate, virus CollocationsThe living worldAnimals animals mate/​breed/​reproduce/​feed (on something) fish/​amphibians swim/​spawn (= lay eggs) birds fly/​migrate/​nest/​sing insects crawl/​fly/​bite/​sting insects/​bees/​locusts swarm bees collect/​gather nectar/​pollen spiders spin/​weave a web snakes/​lizards shed their skins bears/​hedgehogs/​frogs hibernate insect larvae grow/​develop/​pupate an egg/​a chick/​a larva hatches attract/​find/​choose a mate produce/​release eggs/​sperm lay/​fertilize/​incubate/​hatch eggs inhabit a forest/​a reef/​the coast mark/​enter/​defend (a) territory stalk/​hunt/​capture/​catch/​kill preyPlants and fungi trees/​plants grow/​bloom/​blossom/​flower a seed germinates/​sprouts leaves/​buds/​roots/​shoots appear/​develop/​form flower buds swell/​open a fungus grows/​spreads/​colonizes something pollinate/​fertilize a flower/​plant produce/​release/​spread/​disperse pollen/​seeds/​spores produce/​bear fruit develop/​grow/​form roots/​shoots/​leaves provide/​supply/​absorb/​extract/​release nutrients perform/​increase/​reduce photosynthesisBacteria and viruses bacteria/​microbes/​viruses grow/​spread/​multiply bacteria/​microbes live/​thrive in/​on something bacteria/​microbes/​viruses evolve/​colonize something/​cause disease bacteria break something down/​convert something (into something) a virus enters/​invades something/​the body a virus mutates/​evolves/​replicates (itself) be infected with/​contaminated with/​exposed to a new strain of a virus/​drug-resistant bacteria contain/​carry/​harbour (especially US English) harbor bacteria/​a virus kill/​destroy/​eliminate harmful/​deadly bacteria More Like This Easily-confused plural/​singular forms bacteria/​bacterium, criteria/​criterion, data/​datum, media/​medium, phenomena/​phenomenon, strata/​stratumSee worksheet.
See the Oxford Advanced American Dictionary entry: bacteria