1. a social system in which a group of individuals of the same species cooperate in raising young, divide labor into reproductive and non-reproductive castes, and overlap generations within a colony.
Usage: biology; entomology; formal

Examples

• Eusociality is most famously observed in honeybees, where a queen lays eggs and workers perform all other tasks.
• Ants exhibit eusociality through their complex colony structure with distinct castes.
• The evolution of eusociality in insects represents one of the major transitions in evolution.
• Termites are another example of insects that have developed eusociality.
• Researchers study eusociality to understand how cooperation and division of labor evolved in social animals.