 "Musilanguage" is a term coined by Steven Brown to describe his hypothesis of the ancestral human traits that evolved into language and musical abilities.It is both a model of musical and linguistic evolution and a term coined to describe a certain stage in that evolution.Brown argues that both music and human language have origins in a "musilanguage" stage of evolution and that the structural features shared by music and language are not the results of mere chance parallelism, nor are they a function of one system emerging from the other.