The tailbone is the area where “the eight fetal cells” are located in our etheric Auric Blueprint in our Lightbody and they control the Kundalini energies and their momentum of the planetary forces as they run through the personal meridian and Nadial System. Main vertical spiritual current column runs up the center of the body is called the Hara Line. This is related to the formation of the 1st of the 1st Eight Cells of the Spirit Body in the Tailbone. It is where the Hara Currents come from. And before the Hara Currents we have the Core Currents that come from the Eye of God.
All nine dimensions of the Spectrum of Frequency or the triad of three sets of Kundalini energies are coiled up within eight fetal cells located on the tailbone or coccyx. These eight fetal cells are created at the time of conception. The incarnating consciousness identities are connected in these intelligent layers of Spectrum of Frequency which are linked into the Silver Cord of the Soul and hold the Birth Transduction Sequence imprint of the entire Consciousness.
The Kundalini coils in the coccyx are connected to the Silver Cord and to the Pineal Gland in the brain. When the Pineal Gland receives enough stimulation of higher dimensional Spectrum of Frequency activation into the Soul bodies and DNA activation begins.
This area for most humans is highly vulnerable as many of us have been implanted with a “reptilian tail” that obstructs or siphons the energies out of the root chakra areas as well as the earth chakra connector that is about 6 inches beneath our feet. 
This are Alien Implants that are designed to block the root 1st Chakra and the fetal cells in the tailbone from activating stages of kundalini which is imperative to the awakening Consciousness or progressing in the spiritual Ascension process.
The Monad body is activated through Kundalini spiral of energies that move up the spine that are connected to these fetal cells in the tailbone. In an Oraphim or Indigo these will be active in alignment to the organic biological spiritual process in the Silicate Matrix. At age 22 the Soul Matrix will started finalizing its embodiment. At age 33 the Monad will start to activate a Kundalini awakening to progress the Avatar into control over the body, mind and consciousness. This also is the process of which reconnect the Silver Cord to link directly with the Threefold Founder Flame.
Term first found in HGS Manual: Page 59