The Collaborative International Dictionary
Diffusiveness
Diffusiveness \Dif*fu"sive*ness\, n. The quality or state of being diffusive or diffuse; extensiveness; expansion; dispersion. Especially of style: Diffuseness; want of conciseness; prolixity.
The fault that I find with a modern legend, it its
diffusiveness.
--Addison.
Wiktionary
diffusiveness
n. The state or quality of being diffusive.