Abbreviation is FA.
Through the fall of our experience, the Seraphim also fell in their own experience and were polarized in their own negative form, of which, shadow elements of themselves came to be distorted creations of their perfection. This is what is known as the Fallen Angelics which also interconnect with multiple hierarchies down into the Demonic Races and the Watchers. What they are showing us here today is that the Fallen Angelics became distorted Negative Forms of the mind and Consciousness of the original perfection of the Seraphim.
Demons or Fallen Angelics are a part of the human and nonhuman collective consciousness on the earth and exist as energetic interplay between human beings that were designed to manifest the required polarities that are necessary for manifestation in the material realms. In this density of the earth counterbalance points were required for the evolutionary process of “synthesis of these main polarities” through the three main sets of forces. However, many of these forces have been abused through the hidden NAA invasion histories and have created severe schisms and destruction. See detail on the hierarchy of the Fallen Angelics here. 
Fallen Angelic History
Now during the Atlantian Cataclysm and what is known as the Luciferian Rebellion about 26,000-30,000 years ago, this is when the planetary star gates, the planetary grids Ley Lines became controlled by the NAA Controlling races such as the Reptilians, the Annunaki , the Alpha Draconis/Orion Group Draconians. And this Golden Eagle Grid grid became, during this time, under the control of these beings who used these collective consciousness grids for reversed purposes of malintent designed for the NAA and the False Gods which was the opposite from their original purpose.
So, in the last 26,000 years, the Golden Eagle Grid became controlled and was primarily used as a mind control broadcast station, literally, that would send out false information or manipulated information to the mass human population. One purpose in the Iran Gate is to send out False King of Tyranny patriarchal domination mind control through the ArchAngel Michael Matrix collective. It was sending out information that was about the program that the Annunaki to continue to plummet humanity into false Timelines of which is one of darkness, enslavement and separation using software called the Armageddon Software, Metatronic Reversal and Victim-Victimizer. The Golden Eagle Grid literally became like a mind control weapon because that is what they have been using it for. It had been reclaimed back a few years ago in terms of the Guardian Founder Races who are working to rehabilitate the places of the fallen consciousness grids Fallen Angelic mind matrix and override the patriarchal mind control through the Solomon Shield and activation of the Mother Arc Hubs.
Fallen Ones Became Dead Light
Because these Entities, whether they are sourced as Satanic or Luciferian spirit force or embodied as Negative Aliens, all of these groups believe themselves to be Superior as a “God”, using or creating inferior beings to run energetic waste is their inherent design. (We see these beliefs superimposed upon the human pawns that are in positions of power to rule this plane and have lost their identity as a true human.) These Entities became a false albeit perceived “Supreme God” of their own replicated worlds, and energetically enslaved others to serve their continued existence and “rule” in Artificial Machinery. Toxic with the ultimate delusion of the Supreme Ego Arrogance as a self proclaimed “God-King” these entities became the “Fallen Ones”. See False Gods and Fallen Angelics and the 666 Seal.
When our Planetary Logos was invaded and corrupted by the Reptilian Controllers (Archons) of the NAA, the planet and our race were impacted dramatically. It meant we were no longer free to create and evolve as per the original Blueprint of our intended creation, and we had no memory of what had happened to us. We were recycled through continual reincarnation on the Astral Plane with no memory of the past lives, who we really are, where we are going, or what our real relationship is to God and what humanities “purpose” actually is. Over time most of us lost our feeling connection to our Soul Matrix and we became numb to the pain in order to survive in anti-human based structures. What has happened to our planet is not human, it is “alien” to the true nature of humanity.
Many of the Nephilim were destroyed on the earth during the Nephilim Wars and their fragmented consciousness become enmeshed with the lower demonic spirits of the dense levels of earth matter. Some of these entities bound to the earth became known as the Watchers, and comprise of both combinations of Nephilim and Fallen Angelic fragments such as Belial and Baal entities. Over time these fragments evolved into many lower spirit hierarchies of entities, trapped within the earth fields unable to evolve or heal.
Term First Found in HGS Manual on Page 88