An organism is an animal or plant, especially one that is so small that you cannot see it without using a microscope.
例句
Not all chemicals normally present in living organisms are harmless.并不是所有常见于生物体中的化学物质都无害。...the insect-borne organisms that cause sleeping sickness.通过昆虫传播、导致昏睡病的微生物
英汉词典释义
n.
有机物, 有机体; 生物
It was an infectious organism that he studied.他研究的是一种可传染病菌的微生物。
有机体系
The army is an extremely complex organism.军队是一个极其复杂的组织。
英英词典释义
Noun
1. a living thing that has (or can develop) the ability to act or function independently
2. a system considered analogous in structure or function to a living body;