cooperation in lowering tariffs to permit the movement of components among different countries when it is more profitable for each country to produce parts of a product than the whole.
British Dictionary definitions for complementation
complementation
noun
the act or process of forming a complement
geneticsthe combination of two homologous chromosomes, each with a different recessive mutant gene, in a single cell to produce a normal phenotype. The deficiency of one homologue is supplied by the normal allele of the other
Functional interaction between two defective viruses permitting replication under conditions inhibitory to the single virus.
Interaction between two genetic units, one or both of which are defective, permitting the organism containing these units to function normally, whereas it could not do so if one unit were absent.
