My Hero Academia: Scientific Terminology for Quirks
At least scientific terms that I think would be used in this world on academic papers and so on. Like how 'Quirk' seems to a layman's term or widely accepted slang while 'meta-ability' is the more technical word used.
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Aves Class Homo Sapien: Avian-based heteromorph Quirks
Binate-Quirk: A Quirk comprised of two separate and/or unrelated abilities. (Example: Shouto's fire and ice.)
Combustion Immunodeficiency Disorder*: The condition of not having a resistance and/or immunity to fire in spite of having a fire-based Quirk. (Example: Touya.)
Mammalia Class Homo Sapien: Mammal-based heteromorph Quirk
Nonlinear Mutation Phenomenon: The circumstance in which a child is born with a Quirk that has no obvious origin from either parent. (Example: Eri being born with Rewind despite neither of her parents having a Quirk like that.)
Reptilia Class Homo Sapien: Reptile-based heteromorph Quirk
Sentient Animalia Meta-Ability Manifestation Phenomenon: A rare occurrence in which a non-human organism manifests a Quirk. (Example: Nezu.)
Sentient Meta-Ability Phenomenon: A Quirk that has conscious thought, self-awareness, and can communicate with its host and/or other people. (Examples: Tokoyami's Dark Shadow and Rody's Pino.)
Triune-Quirk: A Quirk comprised of three separate and/or unrelated abilities. (Example: Nine's Weather Quirk; his control over precipitation (water), wind, and lightning (electricity.)
Tetrad-Quirk: A Quirk comprised of four separate and/or unrelated abilities. (Unheard of in MHA's canon, but basically what Aang's (ATLA) Quirk would be if he were an MHA character, control over water, earth, fire, and air.)
Vanishing Meta-Ability Syndrome: The sudden and inexplicable loss of one's Quirk. (The technical medical jargon used to describe AFO's actions before doctors realized there was a person behind it, but I can also see sudden Quirk loss happening as a result of a traumatic event, whether it's a physical injury or psychological damage.)
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*Immunodeficiency is a condition in which the immune system is in some way impaired or absent, generally resulting from a missing component in genetic makeup. Since skin is part of the immune system and Touya's genetic disparity presents itself as his body not having the natural resistance to his fire-Quirk that it's supposed to, I would think doctors in the My Hero 'verse would probably classify that condition as a form of congenital immunodeficiency. That is a word that I can see being slightly redefined/adjusted to suit new medical issues that appeared with the advent of superpowers since I doubt he's the only one who has complications involving an incompatible Quirk.
