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1. An impelling or restraining force; a compulsion.
2. Joint action.
3. Ecology Any of the reciprocal actions or effects, such as symbiosis, that can occur in a community.

[Middle English coaccioun, from Latin coāctiō, coāctiōn-, a collecting, from coāctus, past participle of cōgere, to collect, condense; see coagulum. Senses 2 and 3 : co- + action.]

co·ac′tive adj.
co·ac′tive·ly adv.


1. (Environmental Science) any relationship between organisms within a community
2. joint action
3. obsolete a force or compulsion, either to compel or restrain
[C17: co- + action]
coˈactive adj
coˈactively adv
ˌcoacˈtivity n


(koʊˈæk ʃən)

1. joint action or interaction.
2. any interaction among organisms within an ecological community.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.coaction - act of working jointly; "they worked either in collaboration or independently"
cooperation - joint operation or action; "their cooperation with us was essential for the success of our mission"


Joint work toward a common end:
References in periodicals archive ?
Positive antibacterial coaction between hops (Humulus lupulus L.
The main positive driver for the market was represented by the statements on coaction of FED, ECB, Bank of England, CB of Switzerland and Japan on providing dollar liquidity.
Among them are the potential contribution of student-oriented case studies to the creative industries and entrepreneurship education, resurrecting coaction theory to account for diversity among students and educators, North African entrepreneurs in France as an example of an ethnic minority, and the role of an entrepreneurial learning team in creating an enterprise culture in a university.
magistrate applies his authority and coaction to its parts.
It states that if (M, [rho]) is a left Hopf module over K, then M is free as a left K-module and in fact is isomorphic to the Hopf module K [cross product] Q, where Q is the space of coinvariants for the coaction [rho].
A red light pretreatment enhances CRY1 mediated induction of chalcone synthase in Arabidopsis indicating coaction between CRY1 and PHYB (Wade et al.
Social influences on creativity: Evaluation, coaction and surveillance.
Positive antibacterial coaction between hop (Humulus lupulus) constituents and selected antibiotics.
1995, Effects of coaction, expected evaluation, and goal setting on creativity and productivity, Academy of Management Journal 38, 483.
212) "culture moves rather like an octopus too _ not all at once in a smoothly coordinated synergy of parts, a massive coaction of the whole, but disjointed movements of this part (.
This critical coaction has future implications for the early foundation-building of intellectual capital for the nation's future research capacity and scholarly capability.
The external coaction, indeed, whereby men were forced to obey the jurisdiction of the Church, was only from the King, but the power of spiritual jurisdiction itself was from Christ, who had given it unto his Apostles, and they to their successors in ordination.