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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.


(koʊˈæk tɪv)

acting together.
co•ac′tive•ly, adv.
co`ac•tiv′i•ty, n.
References in classic literature ?
In the growth of the embryo, Sir Everard Home I think noticed that the evolution was not from one central point, but coactive from three or more points.
Coactive Design: Designing Support for Interdependence in Joint Activity.
With this in mind, six organizations Wednesday launched the TRACS Transportation Coactive, to gather expertise from different transport stakeholders and academics and create a "sustainable transportation plan" to present to Cabinet.
The majority of these studies have been conducted in coactive team/group contexts where the overall performance of teams is dependent upon the summation of individual performances (but where no specific interaction between team members is necessary: e.g., a swimming relay race).
Contract award notice: Concession of the service of ordinary management, Assessment of evasion and collection also coactive of taxes and municipal revenue
More specifically, Coactive and bidirectional relations involving genetic, neural, social, and cultural all exert an impact upon the individuals' behaviour (Gottlieb, 2007).
The solid-state Blighter passive electronically scanned array (PESA) radar detects small and slow-moving targets - even in cluttered environments - due to the radar's coactive frequency modulated continuous wave (FMCW) Doppler fast-scan processing.
[22] tested coactive neurofuzzy inference system which combines fuzzy model and neural network in permeability prediction in a tight gas reservoir and gained convincing results.
Parthiban and Subramanian [27] developed a coactive neurofuzzy inference system (CANFIS) for prediction of heart diseases.
For example, performance in interactive team sports has been gauged using win-loss records (34,58), and in a coactive sport using individual golf scores (60).
This is confirmed by the acceptance of the alternative hypothesis which says that there is a significant relationship between coactive process and social dialogue (chi-square value 77.143; table value 9.49).