Definitions for ecotoneˈɛk əˌtoʊn, ˈi kə-
Random House Webster's College Dictionary
ec•o•toneˈɛk əˌtoʊn, ˈi kə-(n.)
the transition zone between two different plant communities, as that between forest and prairie.
Origin of ecotone:
1900–05; eco - +tone < Gk tónos tension
a transition area between two adjacent ecological communities (ecosystems).
Origin: Combination of -tone, from the Greek τόνος.