synergism
Pronunciation: sin′ĕr-jizm
Definition: Coordinated or correlated action of two or more structures, agents, or physiologic processes so that the combined action is greater than the sum of each acting separately.
Synonym(s): synergia, synergistic effect, synergy
[G. synergia, fr. syn, together, + ergon, work]
Search Stedman's Medical Dictionary
Examples: glitazone, GI cocktail, etc.

