DEFINITION of 'Regulation E'. A regulation set forth by the Federal Reserve. Regulation E outlines the rules and procedures for electronic funds transfers (EFTs) and outlines guidelines for those who sell and issue electronic debit cards. Rules pertaining to consumer liability for unauthorized card usage fall under this regulation as well. Next Up.
Essaim. Essaim is a French military reconnaissance microsatellite constellation. Its main purpose is to collect and map signals intelligence across the world. The DGA describes it as a vacuum cleaner for [radio] waves.
Definition of Eschar. 1. n. A dry slough, crust, or scab, which separates from the healthy part of the body, as that produced by a burn, or the application of caustics. 2. n. In Ireland, one of the continuous mounds or ridges of gravelly and sandy drift which extend for many miles over the surface of the country.