Definition of nondiffusible
: not able to diffuse or be diffused (as through a membrane) : not diffusible nondiffusible molecules a nondiffusible solute
First Known Use of nondiffusible
Medical Definition of nondiffusible
: not diffusible nondiffusible anions
Seen and Heard
What made you want to look up nondiffusible? Please tell us where you read or heard it (including the quote, if possible).