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  • Adamantium: An artificially created alloy of iron that is the most impervious substance known on Earth, with the exception of the unknown Adamantium-Vibranium alloy of which Captain America's shield is composed.
  • Alien: (1.) A being who originates elsewhere than Earth. (2.) Of or having to do with a place other than Earth.
  • alternate Earth: A world resembling Earth in physical characteristics, natural phenomena, life forms, and, to some extent, history, which exists in the equivalent space to Earth's in another dimension. An alternate Earth may either be a divergent Earth or a parallel Earth.
  • alternate future: One of the possible future realities deriving from the present reality through a specific sequence of events. One cannot tell which alternate future will become one's present reality until the point of divergence has been passed. At that point, one's reality diverges into more than one, and versions of one's self will exist in each resulting alternate future. Hence, one's divergent self will experience one of the alternate futures as his present reality, while another of his divergent selves will experience a different alternate future as his.
  • alternate world: A world in another dimension which exists in the equivalent space to a world in this dimension. Some alternate worlds which are not alternate Earths may exist in the equivalent space to Earth's in other dimensions.
  • amphibious: Capable of breathing and existing in air or in water.
  • android: An artificial being designed to resemble a human being in as many ways as possible, and whose physiology and life functions replicate and mimic those of human beings as closely as possible. An android has all the same organs, tissue, bone, flesh, and blood as a human being, except they are synthetic. Compare with clone, cyborg, robot, and synthozoid.
  • anti-graviton: A theoretical particle carrying a force that repels gravity.
  • anti-matter universe: A universe composed of anti-matter rather than matter (as in our universe) existing in another dimension. The only one known to date is the Negative Zone.
  • anti-matter: Matter composed of particles that are the counterparts of the particles composing positive matter (the matter of which this universe is composed), but have opposite charges; e.g., anti-protons instead of protons, and positrons instead of electrons. Should positive matter come in contact with an equal amount of antimatter, both will be annihilated and converted to energy.
  • astral body: The sheath or form that contains a living being's life essence, consciousness, spirit or soul. The astral body is a manifestation of the life essence composed of ectoplasm, an invisible, intangible substance whose source and properties remain unknown. While all living beings have astral bodies, certain adepts using psychic, psionic, or magical means, can separate their astral bodies from their physical bodies without harm. The astral body is also sometimes called astral form, astral self, and spirit form.
  • astral plane: An alternate universe in an equivalent space to our own where all matter is composed of ectoplasm. On the astral plane, the life energies and consciousnesses of other beings are discernible to adepts. Adepts can reach the astral plane by psychic, psionic, or magical means. The astral plane is also sometimes called astral dimension, astral realm, or spirit world.
  • astral projection: The ability to project one's astral body from one's physical body by psychic, psionic, or magical means.


  • Big Bang: The explosion of a primal mass at the beginning of this universe, which created this universe.
  • bio-: Pertaining to life or its functions.
  • bioelectricity: Electricity generated naturally by a living being.
  • biokinetics: Energy generated by a living being through motion.
  • bionic: Of or having to do with an artificial simulation of a living thing or, more usually, of part of a living thing. A cyborg possesses certain bionic limbs or organs. An android's body is entirely bionic.
  • biosphere: The part of the world in which living beings can exist, or, as used in this text, all of the living beings of a world.


  • clairvoyance: The ability to perceive things beyond the reach of the senses. The term is often used in a narrower sense as a synonym for precognition.
  • clone: A living being created from the DNA (deoxyribonucleic acid) of another living being. Since the DNA molecules within any cell of a living organism contains the cellular template for the entire organism, another whole organism can be grown from a single cell. A clone is always identical to its parent organism, except with regard to differences either might accumulate in the course of living, like scars. Normally, a clone is also younger than the parent organism. The science of cloning is practiced by exceedingly few genetics engineers on Earth today.
  • cosmic awareness: Enhanced consciousness enabling a sentient being the sensation of oneness with the universe. This enhanced consciousness enables a mind to perceive information that is closed to the five physical senses.
  • Cosmic Cube: An object created by the subversive scientific organization AIM to contain a powerful reality-changing energy-being. Earth's Cosmic Cube no longer exists and the being within has hatched.
  • cosmic power: Energy derived from non-Earthly sources that the technologies of most sentient races cannot tap, and that is on a scale far beyond what most Earthly technology can tap or generate. Cosmic power is possessed by such entities as Galactus, the Silver Surfer and other Heralds of Galactus, and the Elders of the Universe.
  • cosmic radiation: Streams of atomic nuclei bombarding Earth and other planets from outer space.
  • cosmic: Of a scale beyond that which is normal on Earth.
  • cybernetics: The comparative study of automatic control and communications systems, whether biological (e.g., the human nervous system) or artificial (e.g., computers).
  • cyborg: Cybernetic organism. A living being who contains cybernetic or bionic parts to replace and / or enhance physical parts.


  • Darkforce: An unknown form of extradimensional energy that manifests itself in our universe as a non-reflective, highly opaque, black substance. Certain adepts use psychic, psionic, or magical means to draw this energy into our dimension and use it in various ways.
  • death gods: Superhuman beings who generally dwell on extradimensional worlds and who have at least temporary control of certain ghosts. These beings are sometimes physical and sometimes ectoplasmic.
  • death: The cessation of all life functions in a living being, causing its life essence (also known as consciousness, spirit, or soul) to depart the physical body. Certain life essences have temporarily continued to exist in known realities after death clad in the astral body. An astral body whose physical form has died is called a ghost. The final fate of the life essence or soul after death is not known to science.
  • Death: The quasi-physical ectoplasmic being who embodies death.
  • demon: A godlike being whose form and functions have degenerated so it preys upon the living in some way.
  • Deviant: A member of an evolutionary offshoot of humanity created through experiments performed by the alien Celestials. Deviants tend to look monstrous and have no set phenotype (physical characteristics common to all members).
  • dimension travel: The process of leaving the space of our universe and entering that of another one, accomplished by physical, psychic, psionic, or magical means. The mechanics of dimension travel are un known to all but a few.
  • dimension: A universe or realm containing space, matter, and energy which is separated from our own universe by some physical difference in the space, matter, and energy itself.
  • divergence: The process by which a single reality becomes more than one upon reaching a certain point in time. At this point of divergence, an event occurs differently in each diverging reality, leading to a radically different chain of events in each one.
  • divergent Earth: A world resembling Earth in every way up until a single juncture in time where events occurred a different way than they did on our Earth. There is an infinite number of possible divergent Earths, but no one knows how many actual divergent Earths there are. Divergent Earths exist in the equivalent space to our Earth's in other dimensions. A divergent Earth is an alternate Earth but not a parallel Earth.


  • ectoplasm: An ethereal substance whose source and properties remain unknown from which astral bodies and other astral phenomena are formed. All of the matter of the astral plane is composed of ectoplasm, but it has not been proven that astral bodies draw their substance from them.
  • Elder of the Universe: A sentient being who originated in one of the galaxies that was the first to form after the creation of the universe, and who survived the death of that galaxy.
  • Elf: A certain humanoid being native to the Asgardian realm of Alfheim and Svartalfheim, and possibly other extradimensional worlds as well.
  • empathic: Having the capability to share the emotions of another through psychic means.
  • entropy: The universal tendency for energy in a closed system to wear down. On a universe-wide scale, entropy is the ultimate degradation of matter and energy to an inert uniform state incapable of sustaining life.
  • ESP (Extrasensory Perception): The psychic powers of telepathy, precognition, clairvoyance. A person who possesses ESP is called an esper. The spy organization SHIELD has employed an Esper Division.
  • Eternal: A member of an evolutionary offshoot of humanity created through experiments by the alien Celestials. Eternals have extraordinarily long life spans, are virtually indestructible, and possess superhuman physical and energy-manipulative powers.
  • extradimensional: (1.) A being from a dimension other than that of the Earth. (2.) Of or having to do with a dimension other than that of the Earth.
  • extraterrestrial: (1.) A being from a world in this dimension other than Earth. (2.) Of or having to do with a world In this dimension other than Earth.

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