noun
- One of the parts of an organism that correspond to each other in a radially symmetrical animal, such as the arms of a starfish or tentacles of a sea anemone.
Usage: biology; zoology
Examples
- In a starfish, each arm is an antimere that mirrors the structure of the others.
- The sea anemone's tentacles function as antimeres arranged around its central mouth.
- Radial symmetry means the organism can be divided into multiple identical antimeres.
- Biologists study antimeres to understand how radially symmetric animals develop and function.