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.

Apr 5, 2022 · Microbes are tiny living things that are found all around us. Also known as microorganisms, they are too small to be seen by the naked eye. They live in water, soil, and in the air. The human …

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 …

Microbes are organisms that are too small to be seen without using a microscope, so they include things like bacteria, archaea, and single cell eukaryotes — cells that have a nucleus, like an amoeba or a …

Jun 16, 2022 · A microbe refers to any of the microorganisms, especially those causing diseases or infections. The term microbe was coined to refer collectively to microscopic organisms, including …

Dec 4, 2025 · The word microbe was coined in the last quarter of the 19th century to describe these organisms, all of which were thought to be related. As microbiology eventually developed into a …

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

May 18, 2025 · Microbes are tiny living things found all around us, too small to be seen with the naked eye. Also known as microorganisms, they require microscopes to be observed and studied. Most …

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