Definition of bacteria
: bacterium —not usually used technically
Is bacteria singular or plural?
Bacteria is regularly a plural in scientific and pedagogical use; in speech and in journalism it is also used as a singular, and it is sometimes pluralized as bacterias. caused by a bacteria borne by certain tiny ticks — Wall Street Jour. more resistant to chlorine and elevated water temperatures than other bacterias — Allan Bruckheim, M.D., Chicago Tribune These journalistic uses are found in British as well as American sources.
Recent Examples of bacteria from the Web
Experts generally advise waiting two to three weeks before swimming with new body art to prevent bacteria from entering the exposed tattoo site.
Toxic flame retardants previously used in mattresses and furniture are also produced by South Pacific sea sponges that manufacture the chemical with the help of bacteria, scientists from Scripps Institution of Oceanography revealed in a new study.
The E. coli bacteria’s effects can run from bloody diarrhea and dehydration to Hemolytic Uremic Syndrome (HUS), a form of kidney failure that can lead to death.
The reclassification follows recent evaluations showing unacceptable bacteria levels in part of the waterway.
Heart valves are not directly inflamed and scarred by the strep bacteria.
An 18-month investigation by The Associated Press during the run up to the Olympics found dangerously high levels of bacteria and viruses in Rio beaches.
Biohybrid motors would match a biological agent like bacteria with a synthetic component capable of functioning within the body.
Bell had become fascinated with a part of the immune response known as the complement cascade, which helps the blood stream get rid of damaged cells and bacteria.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'bacteria'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Did You Know?
Microscopic single-celled organisms lacking a distinct nucleus are known as bacteria. They may be shaped like spheres, rods, or spirals. They inhabit virtually all environments, including soil, water, organic matter, and the bodies of animals. Many bacteria swim by means of long whip-like structures called flagella. The DNA of most bacteria is found in a single, circular chromosome, and is distributed throughout the cytoplasm rather than contained within a membrane-enclosed nucleus. Though some bacteria can cause food poisoning and infectious diseases in humans, most are harmless and many are beneficial. They are used in various industrial processes, especially in the food industry (for example, in the production of yogurt, cheeses, and pickles).
Origin and Etymology of bacteria
plural of bacterium
First Known Use: 1864
Medical Definition of bacteria
Medical Definition of bacteria
1: bacterium—not usually used technically caused by a bacteria borne by certain tiny ticks—Wall Street Journal a single bacteria—there are roughly 200 in each cough—apparently can infect a person—Cheryl Clark
2plural capitalized : a domain in the system of classification dividing all organisms into three major domains of life that includes the prokaryotes that are bacteria but not those that are archaebacteria or archaea—compare eubacteria
Seen and Heard
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