Wiktionary
imidazolate
n. (context organic chemistry English) The anion formed from imidazole by loss of a proton; any salt containing this anion
Wikipedia
Imidazolate
Imidazolate (CHN) is the conjugate base of imidazole. It is a nucleophile and a strong base. The free anion has C symmetry. Imidazole has a pK of 14.05, so the deprotonation of imidazole (CHNH) requires a strong base.