nonideal

[ non-ahy-dee-uhl, -deel ]
/ ˌnɒn aɪˈdi əl, -ˈdil /

adjective Physics.

(of a gas or solution) differing in behavior from that of an ideal gas or solution.

Origin of nonideal

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020