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

This involves genetically engineering microorganisms, such as moulds, to produce a specific material in a fermentation process.

From BBC • Jun. 4, 2026

His company gathers data on environmental conditions and available substrates, and sequences the genomes of microorganisms appropriate for the food industry.

From BBC • Jun. 4, 2026

Scientists say these microorganisms could also interact with environmental pollutants inside the body.

From Science Daily • May 18, 2026

Phosphorus-removing microorganisms are less effective when it’s hot, making summer a stress test for CREW’s system.

From The Wall Street Journal • May 14, 2026

Medical men and even the general public were becoming aware that the human environment was inhabited by an enormous number of microorganisms capable of causing disease, just as today carcinogens pervade our surroundings.

From "Silent Spring" by Rachel Carson