Bacteria (sing. bacterium) are very small organisms. They are prokaryotic microorganisms. Bacterial cells do not have a nucleus, and most have no organelles with membranes around them. Most have a cell wall. They do have DNA, and their biochemistry is basically the same as other living things. They are amongst the. In 1676, Anton Van Leeuwenhoek first observed bacteria through a microscope and called them “animalcules.” In 1838, the German Naturalist Christian Gottfried Ehrenberg called them bacteria, from the Greek baktḗria, meaning "little stick." An apt word, as the first observed bacteria were shaped like rods, although. Bacteria definition, ubiquitous one-celled organisms, spherical, spiral, or rod- shaped and appearing singly or in chains, comprising the Schizomycota, a phylum of the kingdom Monera (in some classification systems the plant class Schizomycetes), various species of which are involved in fermentation, putrefaction,. Define bacteria: bacterium —not usually used technically — bacteria in a sentence. Define bacterium: any of a domain (Bacteria) of chiefly round, spiral, or rod- shaped single-celled prokaryotic microorganisms that typically live in … bacteria definition: The definition of bacteria are microorganisms that are the basis of fermentation and infectious diseases. (noun) An example of bacteria are the organisms that cause common human illnesses like strep throat.. Bacteria definition: Bacteria are very small organisms. Some bacteria can cause disease. | Meaning, pronunciation, translations and examples. Medical Definition of Bacteria. Bacteria: Single-celled microorganisms that can exist either as independent (free-living) organisms or as parasites (dependent on another organism for life). The plural of bacterium. Examples of bacteria include Acidophilus, a normal inhabitant of yogurt; Gonococcus which causes gonorrhea; . Definition of bacteria: Singular 'bacterium.' Microscopic single-cell (unicellular) life form that exists practically everywhere in the Earth's environment, and is simpler than the cells of animals, fungi, and plants. Of.
any of a division (Bacteria) of monerans, microorganisms which are typically one-celled, have no chlorophyll, multiply by simple division, and can be seen only with a. Bacteria are microscopic living organisms, usually one-celled, that can be found everywhere. They can be dangerous, such as when they cause infection, or beneficial. 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. Define bacteria: bacterium —not usually used technically — bacteria in a sentence Bacteria definition: Bacteria are very small organisms. Some bacteria can cause disease. | Meaning, pronunciation, translations and examples The original modern hypothesis of the positive role played by certain bacteria was first introduced by Russian scientist and Nobel laureate Élie Metchnikoff, who in. Bacteria are single-celled, or simple, organisms. Though small, bacteria are powerful and complex, and they can survive in extreme conditions. Bacterium definition, singular of bacteria. See more.. (bāk-tîr'ē-əm) Plural bacteria Any of a large group of one-celled organisms that lack a cell nucleus. An anaerobic bacteria culture is a method used to grow anaerobes from a clinical specimen. Obligate anaerobes are bacteria that can live only in the absence. Looking for online definition of erythematous in the Medical Dictionary? erythematous explanation free. What is erythematous? Meaning of erythematous medical term.