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.
Buy an over-the-counter lice treatment. Lice shampoos, lotions, and insecticides are available at your local pharmacy. You should select a lice-killing lotion with 1% permethrin or a mousse that contains pyrethrins and piperonyl butoxide. 1  Perform a âspot testâ to check for allergic reactions.