The story
From (imida)zole + -dronic (“calcium metabolism regulator”) acid.
Etymology from Wiktionary, CC BY-SA 4.0.
zoledronic acid
Today it means: A bisphosphonate drug, (1-hydroxy-2-imidazol-1-yl-1-phosphono-ethyl)phosphonic acid, marketed under the trade names of Zometa and Aclasta, used to prevent bone fractures and to treat hypercalcemia. Full definition →