adjective
- lacking a body cavity or coelom; having no distinct internal cavity between the body wall and digestive tract
Usage: zoology; biology
Examples
- Flatworms are acoelous organisms with no body cavity.
- The acoelous body plan is characteristic of many simple invertebrates.
- Unlike mammals, planarians are acoelous animals.
- Acoelous species lack the internal space found in more complex animals.