complex organism

noun
UK /ˈkɒm.plɛks ˈɔː.ɡən.ɪ.zəm/
US /kəmˈplɛks ˈɔːr.ɡən.ɪ.zəm/

A complex organism is a living thing made of many parts that work together.

A dog is a complex organism because it has a heart, brain, and many other parts.

SYNONYMS

multicellular organismhigher organismadvanced organismdeveloped organism

RELATED WORDS

celltissueorganorgan systemmulticellular

OTHER MEANINGS

2. A living thing with many specialized cells working together.

Unlike a bacterium, a tree is a complex organism with roots, leaves, and bark.

3. An intricate living system that depends on many interacting parts.

Scientists study the human body as a complex organism.

4. A creature whose body has many different kinds of tissues and organs.

A frog is a complex organism that can breathe, move, and digest food.