Microbes, or microorganisms, include bacteria, protozoa, fungi, algae, amoebas, and slime molds. Many people think of microbes as simply the causes of disease, but every human is actually the host to …

MICROBE definition: 1. a very small living thing, especially one that causes disease, that can only be seen with a…. Learn more.

A microorganism, or microbe, [a] is an organism of microscopic size, which may exist in its single-celled form or as a colony of cells. The possible existence of unseen microbial life was suspected from …

The "microbe" category includes microscopic plants. Most microscopic plants are counted among the “green algae” (a general term), and they live as single cells (sometimes with flagella) or long fibers.

Jun 16, 2022 · Microbe Definition What is a microbe? How do we define microbes? Microbes refer to microorganisms that cannot be seen by naked eyes but can only be seen under a microscope. The …

A microbe, or microorganism, is a microscopic organism that comprises either a single cell (unicellular); cell clusters; or multicellular, relatively complex organisms.

Definition of microbe noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Dec 4, 2025 · microbiology, study of microorganisms, or microbes, a diverse group of generally minute simple life-forms that include bacteria, archaea, algae, fungi, protozoa, and viruses.

May 18, 2025 · Microbes, the tiny organisms that surround us everywhere, play crucial roles in our health, environment, and even the planet’s history. Understanding what microbes are is fundamental …

microbe Any microscopic organism but especially a bacterium or virus capable of causing disease. The word is almost synonymous with, but slightly upmarket from, the term ‘germ’.