"variegation" in the noun sense
variability in coloration
2. diversification, variegation
the act of introducing variety (especially in investments or in the variety of goods and services offered
"my broker recommended a greater diversification of my investments"
"he limited his losses by diversification of his product line"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License