eusociality
A technical term in zoology referring to the highest level of social organization, characterized by cooperative brood care, overlapping generations, and division of labor into reproductive and non-reproductive groups.
Ants and bees are known as eusocial insects.
Compound of 真 (shin, 'true') + 社会性 (shakaisei, 'sociality'), a calque of English 'eusociality'.