#endogenous

• Autoanaphylaxis — A severe and rare form of anaphylactic-type reaction (acute hypersensitivity) triggered inside the body by its own pathologically modified substances or proteins, acting as autoantigens, without requiring the introduction of an external allergen from the environment.
• Autoanalgesia — A physiological, neurological, or psychological phenomenon whereby the body spontaneously diminishes, blocks, or suppresses its own perception of physical pain through the internal release of endorphins, enkephalins, or by activating descending inhibitory pathways of the central nervous system, without the administration of external analgesic substances.
• Autophytic — Regarding plants or vegetable organisms: autophytic; developing independently, utilizing exclusively its own organic resources or living within a strictly endogenous ecosystem. In specific branches of evolutionary biology, the term describes vegetation adapted to self-pollination or plants capable of generating their own structural support without mandatory symbiotic interactions with other species.
• Self-formation — A phenomenon or process through which a structure, a geological mass, an organic tissue, or a material configuration generates, models, or originates by itself through strictly endogenous dynamics, without the intervention of external shaping factors. In advanced technical terminology, it describes the capacity of complex systems to structure their material layers autonomously.
• Autogenetic — Pertaining to or relating to autogenesis; originating, developing, or generated from within the same organism or system, without direct external environmental influence or input from another individual. In a molecular sense, the term describes self-regulated biological processes or cellular structures that modify or replicate based on their own constitutive hereditary code.
• Autogeny — A biological theory or phenomenon asserting the spontaneous generation of life or the development of living organisms exclusively through purely internal forces, tendencies, or mechanisms, independent of environmental influences. In older medical and microbiological terminology, the concept referred to the emergence of a disease or bacterial culture directly within the host tissues, without visible external pathogenic input.
• Autogeny — A biological theory or phenomenon asserting the spontaneous generation of life or the development of living organisms exclusively through purely internal forces, tendencies, or mechanisms, independent of environmental influences. In older medical and microbiological terminology, the concept referred to the emergence of a disease or bacterial culture directly within the host tissues, without visible external pathogenic input.
• Autoinfection — A pathological process characterized by the onset of an infectious disease caused by microorganisms (bacteria, viruses, fungi) already normally present in the host's body as commensals or in a latent state, which become virulent due to immune system collapse or their migration into a different, sterile anatomical region. The phenomenon defines endogenous infections occurring without a secondary contact with an external source of contamination.
• Autonyctotropic — Relating to autonyctotropism; describing the autonomous bending or folding movement of plant organs (especially leaves or petals) that occurs periodically with the onset of night, determined exclusively by endogenous biological rhythms and internal structural factors, without depending directly on the presence or intensity of an external light stimulus. This mechanism ensures thermal and hydric protection of the foliar apparatus during nocturnal periods.
• Autotoxin — A toxic substance spontaneously or pathologically produced by one's own organism (through altered cellular metabolism, tissue degradation, or immune dysfunctions), capable of poisoning cells or triggering inflammatory and destructive reactions within the same body. This structural phenomenon underlies the understanding of self-intoxication processes and many chronic autoimmune diseases.