microorganisms

Cultural  

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

---

Example Sentences

In his rare blend, which ages for four years, umami lingers, not saltiness, and the barrels’ microorganisms lend to the complex taste.

From The Wall Street Journal • Apr. 15, 2026

"The latest theory is related to some of the chemistry that goes into ensuring that the wastewater doesn't develop any biofilms," or microorganisms, he said.

From Barron's • Apr. 9, 2026

Until recently, scientists had limited understanding of how the microorganisms in sourdough interact with these fibers.

From Science Daily • Mar. 16, 2026

Allen had a test run on her infant’s gut microbiome—the collection of bacteria and other microorganisms that inhabit the digestive tract.

From The Wall Street Journal • Mar. 3, 2026

One of the first to envision such use of microorganisms was the 19th-century zoologist Elie Metchnikoff.

From "Silent Spring" by Rachel Carson