ˈmyüch(ə)wəˌlizəm, -chəˌl- noun
( -s )
1.
a. : the doctrine or practice of mutual dependence as the condition of individual and social welfare
b. : a socialistic theory advocating a social organization based on common ownership, effort, and control and regulated by sentiments of mutual help and brotherhood
2.
a. : mutually beneficial association between different kinds of organisms (as between various ants and aphids) ; especially : interaction between organisms of two kinds whereby a shared way of life becomes obligatory for both if the population of each is to increase — compare predation
b. : the supposed factor or principle of mutual aid and cooperation among men and the lower animals