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An association between two organisms of different species in which each member benefits.

mu′tu·al·ist n.
mu′tu·al·is′tic adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.mutualist - mutually dependent
dependent - relying on or requiring a person or thing for support, supply, or what is needed; "dependent children"; "dependent on moisture"
References in periodicals archive ?
The mutualist contract is 'the social contract par excellence'; it excludes 'all egoism, all parasitism, the arbitrary, all agiotage [currency exchange fees], all dissolution'.
Nevertheless, these new mutualist ventures at least raise the issue of co-operation among an increasing number of people and in a context where the whole sense of a future is increasingly uncertain.
At the same time, the single-'A'-plus long-term counterparty credit and senior unsecured debt ratings on the company were affirmed on account of its principal role as the listed holding company of the mutualist Sistema Mapfre (Mapfre Group, the main operating entities of which are rated AA-/Stable/--).
These decisions are based on the fact that the acquisition of 67% of CIC's capital by Credit Mutuel has negative implications for the latter's financial profile and represents a considerable management challenge for the mutualist bank.
More than 1 500 decision-makers and influential figures from the international cooperative and mutualist community will attend the 2012 International Summit of Cooperatives in Quebec and Levis, Canada, from October 8 to 11, 2012.
Induced responses in plants that feed and house mutualist defenders (e.
It has been predicted that, over evolutionary time, low frequency or probability of encounter of one mutualist partner will select for the ability to establish a new association or to revert to a nonmutualistic strategy (Addicott 1984, Thomson 1988).
These are "keystone resource species" (sensu Terborgh 1986) or those species that increase the resource availability for other species under very high levels of physical disturbance, stress or predation but low competitive displacement ([ILLUSTRATION FOR FIGURE 5 OMITTED], intersection of lines B and D) and "keystone mutualist species" (sensu Gilbert 1980), or those species that form close coevolved alliances with one another under low mortality and competitive displacement ([ILLUSTRATION FOR FIGURE 5 OMITTED], intersection of lines A and B).
Monetico is the result of a partnership by two major institutions, Desjardins Group in Canada and Credit Mutuel in France, with shared cooperative and mutualist values.
Hebditch declared that the writing of anarchist and mutualist philosophers Pierre-Joseph Proudhon, Mikhail Bakunin and Peter Kropotkin represented an important, under-appreciated lineage within left-wing thought.
Bivalves are known to have a multitude of lifestyles: free-living (Morton, 1973; Lutzen & Nielsen, 2005), commensal (Goto, Hamamura, & Kato, 2007), mutualist (Mokady, Loya, & Lazar, 1998), epizoic (Villegas et al.
Although just 19 percent of Montanans fall into the mutualist category, 33 percent of all western U.