Definition
parazoans
noun
- plural of parazoan; a member of a group of simple aquatic animals, such as sponges, that lack true tissues and organs.
Usage: biology; technical
Examples
- Parazoans are among the most primitive multicellular organisms.
- Sponges are classified as parazoans because they lack true tissues.
- Unlike other animals, parazoans do not have a nervous system or digestive tract.
- Marine biologists study parazoans to understand early animal evolution.
- The parazoan body plan is fundamentally different from that of more complex animals.