A relationship of mutual benefit, especially among different species.
The occurrence of two different or opposing things in the same time and place.
A close, prolonged association between two or more organisms of different species, regardless of benefit to the members.
A close, prolonged association between two or more organisms of different species that normally benefits both members. An interspecies cooperation.
The state of people of different types, races, cultures, communities, etc., living together.
Benefits resulting from combining different groups, people, objects or processes.
The cooperation of two or more nerves, muscles, organs, etc.
A synonym of binding energy.
The combined action of two or more drugs where the effects are stronger than their mere sum.