WordReference Random House Unabridged Dictionary of American English © 2026
eu•so•cial
(yo̅o̅ sō′shəl),USA pronunciation adj. [Animal Behav.]
eu•so•ci•al•i•ty
(yo̅o̅ sō′shē al′i tē),USA pronunciation n.
- Animal Behaviorof or pertaining to a form of insect society, as that of ants, characterized by specialization of tasks and cooperative care of the young.
- 1970–75; eu- + social