tonitruiDictionary entriestonitruum, tonitrui:Neuter · Noun · 2nd declensionFrequency:Lesser= thunder;Entry →gen. sg.loc. sg.tonitrus, tonitrus:Masculine · Noun · 4th declensionFrequency:Lesser= thunder;Entry →dat. sg.ExamplesLiber IILucius Annaeus Seneca (Seneca the Younger) from QUAESTIONES NATURALES"...terrarum motu quaestionem eo posuisti loco, quo de tonitruis fulgoribusque dicturus? Quia, cum motus terrae fiat spiritu, spiritus..."