diffusivity

noun

dif·​fu·​siv·​i·​ty də̇ˌfyüˌsivətē 

-ˈzi- sometimes (ˌ)dēˌ-

plural -es

1

: diffusion coefficient

2

: the quantity of heat passing normally through a unit area per unit time divided by the product of specific heat, density, and temperature gradient

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now