What is "imidazolidine"

n. (context organic compound English) A saturated heterocycle containing three carbon atoms and two nitrogen atoms; any of its derivatives

Imidazolidine is a heterocyclic compound (CH)(NH)CH. The parent imidazolidine is lightly studied, but related compounds substituted on one or both nitrogen centers are more common. Generally, they are colorless, polar, basic compounds. Imidazolidines are cyclic 5-membered examples of the general class of aminals.