microorganisms

Cultural  

1. Organisms so small that they can be seen only through a microscope. (See bacteria, protozoa, and viruses.)

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Example Sentences

Microorganisms that thrive in harsh settings such as acidic lakes, volcanic soils, and deep caves may be especially useful as we explore what could work under Martian conditions.

From Science Daily • Jan. 6, 2026

For instance, in 2019, a group of 34 microbiologists published a paper titled “Scientists’ Warning to Humanity: Microorganisms and Climate Change.”

From Scientific American • Sep. 8, 2023

“This is a great outcome,” says Amber Hartman Scholz, a microbiologist and head of the science policy department at the Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures.

From Science Magazine • Dec. 21, 2022

Microorganisms are the most abundant form of life on the planet and extremely important to human health and the health of plants and animals.

From Salon • Jun. 25, 2021

Microorganisms affect it in a variety of ways, either converting it into simple fatty acids, or condensing it into longer-chain compounds.

From The Chemistry of Plant Life by Thatcher, Roscoe Wilfred