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.
HEAD LICE PRODUCTS. Our ClearLice lice treatment products will naturally get rid of lice from your head and home (clothing, bedding, furniture, carpets, and car interior) in just one day. ClearLice lice prevention products will help prevent lice from infesting your life.
4 Simple And Best Ways To Use Tea Tree Oil For Lice. Aside from doubling as a treatment for conditions such as insect bites, acne, and nail fungus, tea tree oil is a suggested natural treatment that is effective against lice. This steam-distilled oil is used topically on the skin of the affected area.