zirconio-Chem.,|zəˈkəʊnɪəʊ|also zircono-, and abbreviated zirco-,combining form of zirconium, indicating the presence of zirconium in a compound, as zircon(i)ofluoride, a compound of zirconium fluoride, ZrF4, with any of various oxides (more properly fluozirconate: see fluo-).1868Fownes' Chem. (ed. 10) 383 Double salts, called zircofluorides or fluozirconates.1894Muir & Morley Watts' Dict.Chem. IV. 859/1 Combinations... With various metallic fluorides... These salts are often called zircono-fluorides, or fluo-zirconates; they are better named zirconi-fluorides.