definition bacteria-
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bacteria Noun. 1. bacteria - (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. bacterium.
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Bacteria Bacteria (/baekˈtɪəriə/ ; bækˈtɪəriə: singular) bacterium constitute a large domain of prokaryotic. Microorganisms typically a few micrometres in, length bacteria have a number of, shapes ranging from spheres to rods and. Spirals bacteria were among the first life forms to appear On, earth and are present in most of its. habitatsacteria were among the first life forms to appear on Earth, and are present in most of its habitats. Bacteria inhabit soil, water, acidic hot springs, radioactive waste, and the deep portions of Earth's crust. Bacteria also live in symbiotic and parasitic relationships with plants and animals.
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- Usage notes [edit]. 1  In most formal writing, bacterium is the singular form of the noun, and bacteria the plural form. 2  This is in accord with the word's Latin etymology.3  However, in ordinary speech, some speakers use bacteria as a singular, with plural either bacteria or bacterias. 4  This is usually considered incorrect.lastics are energy-rich substances, which is why many of them burn so readily. Any organism that could unlock and use that energy would do well in the Anthropocene. Terrestrial bacteria and fungi which can manage this trick are already familiar to experts in the field.
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antibiotic an·ti·bi·ot·ic. A substance, such as penicillin, that is capable of destroying or weakening certain microorganisms, especially disease-causing bacteria or fungi. Antibiotics are obtained from other microorganisms, especially molds.
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antibiotic A substance, such as penicillin or erythromycin, produced by or derived from certain microorganisms, including fungi and bacteria, that can destroy or inhibit the growth of other microorganisms, especially bacteria. Antibiotics are widely used in the prevention and treatment of infectious diseases. adj. 1.
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Bacterial Infection and Colon Cancer Bacteria are living things that have only one cell. Under a microscope, they look like balls, rods, or spirals. They are so small that a line of 1,000 could fit across a pencil eraser. Most bacteria won't hurt you - less than 1 percent of the different types make people sick. Many are helpful. Some bacteria help to digest food, destroy disease-causing cells, and give the body needed vitamins. Bacteria are also used in making healthy foods like yogurt and cheese. But infectious bacteria can make you ill.
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How to avoid poisoning of livestock by blue-green algae Blue-green algae poisoning in livestock. Blue-green algae can produce neurotoxins, liver toxins and skin allergens. Livestock can be poisoned by ingestion of algae either in the water or as dried mats on the shore, or from drinking water where algal death has released considerable toxins into the water.
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Infection Infection. Definition. noun, plural: infections. (microbiology) Invasion and multiplication of an infectious agents in body tissues of the host and may lead to clinical symptoms or local cellular injury as a result of competition in metabolism, production of toxins, intracellular replication, or antigen antibody response.nfection is the process or the state wherein an infectious agent (such as pathogenic microorganisms, viruses, prions, viroids, nematodes and helminths) invade and multiple in the body tissues of the host.
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- nitrogen-fixing bacteria noun [plural]. › ​bacteria that can ​absorb ​nitrogen from the ​air and ​change it into a ​form that ​plants can use for ​food. (Definition of nitrogen-fixing bacteria from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press). Browse. 1  nitrogen.
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bioremediation bacteria - (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.
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bacterium Usage notes [edit]. 1  In most formal writing, bacterium is the singular form of the noun, and bacteria the plural form. 2  This is in accord with the word's Latin etymology. 3  However, in ordinary speech, some speakers use bacteria as a singular, with plural either bacteria or bacterias. 4  This is usually considered incorrect.
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What is bacterium? The plural of bacterium is bacteria. The plural possessive is  bacteria's.   (e.g. The bacteria's differing metabolisms make some more  susceptible to the drugs.).o, the word  its is a singular pronoun, the possessive form of it.   The plural form of the possessive pronoun its is theirs.   The plural form of the possessive … adjective its is their.
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What Are Bacteria? Bacteria are prokaryotes, which consist of a single cell with a simple internal structure. Bacteria are microscopic single-celled organisms that thrive in diverse environments. They can live within soil, in the ocean and inside the human gut. Humans' relationship with bacteria is complex. Sometimes they lend a helping hand, by curdling milk into yogurt, or helping with our digestion.
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streptococcus (plural streptococci). 1  A spherical, gram-positive bacterium of the genus Streptococcus. 2  Although commonly found benignly in the human mouth and gut, and though many species are non-pathogenic, other species can cause diseases including strep throat and more serious conditions.
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- Bacteria are microscopic single-celled organisms that can be helpful, such as those that live in our guts, or harmful, such as flesh-eating bacteria. Bacteria are microscopic single-celled organisms that can be helpful, such as those that live in our guts, or harmful, such as flesh-eating bacteria.
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- A substance, such as penicillin, that is capable of destroying or weakening certain microorganisms, especially disease-causing bacteria or fungi. Antibiotics are obtained from other microorganisms, especially molds.
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bacteria 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.
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Medical Dictionary Bacterial: Of or pertaining to bacteria, as in a bacterial lung infection.See the entire definition of Bacterial. Biopsy: The removal of a sample of tissue for examination under a microscope to check for ...
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Bacteria Bacteria, singular bacterium, any of a group of microscopic single-celled organisms that live in enormous numbers in almost every environment on Earth, from deep-sea vents to deep below Earth’s surface to the digestive tracts of humans.
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- Definition of ARCHAEA. : microorganisms of a domain (Archaea) including especially methane-producing forms, some red halophilic forms, and others of harsh hot acidic environments (as a hot spring) — compare bacterium, eukaryote.— ar·chae·al \-əl\ adjective. — ar·chae·an \-ən\ adjective or noun.efinition of ARCHAEA. : microorganisms of a domain (Archaea) including especially methane-producing forms, some red halophilic forms, and others of harsh hot acidic environments (as a hot spring) — compare bacterium, eukaryote. — ar·chae·al \-əl\ adjective. — ar·chae·an \-ən\ adjective or noun. ADVERTISEMENT.
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Medical Definition of Infection Infection: The invasion and multiplication of microorganisms such as bacteria, viruses, and parasites that are not normally present within the body. An infection may cause no symptoms and be subclinical, or it may cause symptoms and be clinically apparent. An infection may remain localized, or it may spread through the blood or lymphatic vessels to become systemic (bodywide). Microorganisms that live naturally in the body are not considered infections. For example, bacteria that normally live within the mouth and intestine are not infections.
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Microorganisms: the good, the bad and the ugly Bacteria in medicine. Living things have defence techniques against harmful bacteria. An organism's ability to defend itself from infection is called immunity. Immunity is defined by the immune system of an organism. Substances that cause the immune response are called antigens.
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bacterium Usage notes [edit]. 1  In most formal writing, bacterium is the singular form of the noun, and bacteria the plural form. 2  This is in accord with the word's Latin etymology.3  However, in ordinary speech, some speakers use bacteria as a singular, with plural either bacteria or bacterias. 4  This is usually considered incorrect.sage notes [edit]. 1  In most formal writing, bacterium is the singular form of the noun, and bacteria the plural form. 2  This is in accord with the word's Latin etymology.
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What Are Bacteria? Bacteria are microorganisms too small to see with the naked eye that exist in virtually all environments in the world. They exist in dirt, water, caves and hot springs, organic materials like fallen trees and dead animals, and inside the bodies of virtually every living animal on earth.ut fortunately, not all bacteria are harmful. A number of the bacteria found in the human body have positive benefits for their host. They can help strengthen the immune system, help digest food, secrete hormones and chemicals and vitamins that benefit the health of the human body, and help regulate human metabolism.
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bacillus -·cil′li·. 1  any of a genus (Bacillus) of rod-shaped bacteria that occur in chains, produce spores, and are active only in the presence of oxygen. 2  any rod-shaped bacterium. 3  loosely any of the bacteria, esp. those causing disease.
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bacterium a beneficial bacterium found in the intestinal tract of healthy mammals; often considered to be a plant. a rodlike bacterium (especially any of the rod-shaped or branched bacteria in the root nodules of nitrogen-fixing plants) a large group of bacteria having rigid cell walls; motile types have flagella.