WordGarden.ioorganism
B1Pronunciation
UK
- /ˈɔːɡənˌɪzəm/
US
- /ˈɔrɡəˌnɪzəm/
Meanings
Noun
a living thing such as an animal, plant, fungus, or microbe
Beyond the definition
Imagine the world around you—from towering trees to tiny ants, even you! All of these are organisms. An organism is simply any individual living thing, whether it's a plant, animal, fungus, or even a single-celled bacterium. It is the biological name for something that is alive, rather than something nonliving.
Think about a bustling forest. Each tree, each bird, and each mushroom is an organism. They share the basic signs of life: they grow, reproduce, respond to their environment, and eventually die. You'll often hear this word in science class when exploring ecosystems or biology, because understanding organisms is a big part of understanding life itself.
The term "organism" refers to any individual form of life capable of growth, reproduction, and responding to its environment. It's a broad category encompassing everything from microscopic bacteria and fungi to complex multicellular creatures like plants, animals, and humans. Essentially, if it's alive, it's an organism!
The concept is central to biology, where scientists study the structure, function, growth, origin, evolution, and distribution of these life forms. It's not just about what something is, but also how it functions as a complete, integrated system. A single bacterium is an organism, even though it consists of only one cell—that cell carries out all the necessary life processes independently. Similarly, a giant redwood tree is an organism, despite being made up of trillions of cells working in harmony.
You'll often encounter "organism" in discussions about ecosystems and biodiversity. Scientists study how different organisms interact with each other and their environment, and how changes in one population can affect an entire ecological community. It is also a fundamental term in evolution, describing how organisms change over generations as populations adapt to their surroundings.
Sometimes, "organism" is used figuratively to describe something that seems to act as a single living whole. This is much less common than the scientific meaning, but it can help express the idea of many parts working together.
So, whether you're examining the smallest microbe under a microscope or marveling at the sheer size of a whale, remember that everything alive falls under this umbrella term. The study of organisms is a testament to the incredible diversity, complexity, and wonder of life on Earth.
Examples
- 1
Pond life
A pond contains many tiny organisms that are hard to see without a microscope.
- 2
Soil life
These organisms live in the soil and help break down dead leaves.
- 3
Extreme environments
Some organisms can survive in places where there is very little light or oxygen.
- 4
Infection testing
Doctors tested the sample to find out which organism was causing the infection.
More examplesFewer examples
- 5
Genetic research
Scientists often use fruit flies as a model organism in genetic research.
- Domainmodel organism
a species scientists study to understand wider biological processes
- 6
Food labeling
The label says the corn was made from genetically modified organisms.
- 7
Figurative use
In her essay, she describes the city as a living organism that grows and changes over time.
- Usage
living organism can be used as a metaphor for something complex that changes and develops
See also
Forms and spellings
2 forms open this card.
Main spelling
- organismnoun
Forms
- organismspluralnoun