English

Noun

coaction

1. (obsolete) force; compulsion, either in restraining or impelling

   (Can we find and add a quotation of South to this entry?)

Etymology 2

co- +‎ action

Noun

coaction ‎(countable and uncountable, plural coactions)

1. Collective or collaborative action.
   • 1997, Lauren B. Resnick, Discourse, Tools and Reasoning: Essays on Situated Cognition

     In the coaction condition, however, where the children did not have any opportunity to interact with one another, the mixed gender pairings produced a marked and statistically significant polarization of performance […]

2. (mathematics) The mapped version of an action to a cogroup.

   actions and coactions of measured groupoids on von Neumann algebras