Webster Dictionary(0.00 / 0 votes)Rate this definition: 1  Fiat(noun) an authoritative command or order to do something; an effectual decree. 2  Fiat(noun) a warrant of a judge for certain processes. 3  Fiat(noun) an authority for certain proceedings given by the Lord Chancellor's signature.
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Now, there's a new option in pharmacies that might just make that note less dreadful. The prescription lotion Sklice (ivermectin) may safely knock out head lice in one 10-minute, comb-free treatment, according to a new study supported by Sklice manufacturer Topaz Pharmaceuticals, now Sanofi Pasteur. The findings appears in New England Journal of Medicine.