#toxicity

• Abrus — (Botany) A genus of climbing plants in the family Fabaceae (Leguminosae), native to tropical and subtropical regions worldwide, characterized by pinnate leaves and pods containing spherical seeds that are often intensely colored and highly toxic due to their abrin content.
• Aldrin — A surname of Germanic or Anglo-Saxon origin, famous due to the American astronaut Buzz Aldrin (b. 1930), the second man to walk on the Moon during the Apollo 11 mission. In the chemical industry and ecotoxicology, the lowercase term (aldrin) designates a highly toxic organochlorine insecticide, banned globally under the Stockholm Convention due to its heavy structural persistence in the environment.
• Alloxanemia — A pathological state or biochemical anomaly characterized by the presence or accumulation of alloxan in the blood. This structural clinical phenomenon is correlated with severe disruptions of uric acid metabolism or the experimental induction of diabetes, indicating the risk of selective destruction of pancreatic beta cells in the islets of Langerhans due to systemic oxidative stress.
• Amidopyrine — A medicinal compound from the pyrazolone class, historically used as a potent analgesic, antipyretic, and anti-inflammatory agent, chemically known as aminophenazone. Although it possesses high structural efficiency in combating fever and acute pain, its modern clinical use has been severely restricted or banned in most countries due to the documented risk of inducing severe agranulocytosis and the formation of carcinogenic nitrosamines in the stomach.
• Anagallis arvensis — The scientific name of the scarlet pimpernel (currently classified as Lysimachia arvensis), an annual herbaceous plant in the family Primulaceae, widespread as a weed in crops, stubble fields, roadsides, and ruderal places. The plant is structurally characterized by four-angled prostrate stems, ovate sessile leaves, and small, solitary flowers of a bright scarlet-red (or blue, in the case of the foemina form), which possess the unique property of closing during cloudy weather or high humidity, acting as a natural barometer.
• Argyria — A rare dermatological and toxicological condition caused by prolonged exposure to or chronic ingestion of silver, silver dust, or silver compounds (such as colloidal silver). This structural condition manifests as the irreversible deposition of metallic granules within connective tissues, mucous membranes, and the dermis, leading to a characteristic slate-blue or silvery-gray pigmentation of the skin that intensifies in areas directly exposed to solar radiation.
• Argyria — A rare dermatological and toxicological condition caused by the pathological and irreversible accumulation of elemental silver particles or its compounds within body tissues, resulting from prolonged occupational exposure or chronic ingestion (such as colloidal silver). This condition structurally manifests as a slate-blue or silvery-gray discoloration of the skin, mucous membranes, and nails, which intensifies in areas directly exposed to solar radiation.
• Aristolochia — A large genus of perennial herbaceous, climbing, or creeping plants in the Aristolochiaceae family, commonly known as birthwort or pipevine. It comprises over 500 species distributed mainly in tropical and subtropical regions, recognized by their bizarre, tubular flowers structurally adapted to temporarily trap pollinating insects. Although historically used in traditional medicine, all species contain aristolochic acid, a compound with extremely high nephrotoxic and carcinogenic potential.
• Arsenic — A chemical element with atomic number 33 and symbol As, located in group 15 of the periodic table, classified as a metalloid with properties intermediate between metals and non-metals. It occurs in several allotropic forms (the most stable being grey arsenic, with a metallic luster), is a semiconductor used in microelectronics and optoelectronics, and, in compound forms, is historically recognized as an extremely dangerous cellular toxin with severe industrial uses.
• Arsenemia — The pathological presence or quantifiable concentration of arsenic in the blood. Evaluating the level of arseniemia constitutes an essential toxicological parameter for diagnosing acute or chronic poisoning with this heavy metal, occurring through industrial exposure, contaminated drinking water, or accidental ingestion.
• Asphyxiating — Causing asphyxia, leading to the cessation of breathing and suffocation by preventing oxygen from entering the lungs or tissues; a dangerous gas, environment, or climate that cancels blood oxygenation. This biochemical structural phenomenon is encountered in toxic industrial emissions or enclosed spaces where carbon dioxide accumulation becomes lethal.
• Atropism — A chronic pathological condition or systemic poisoning caused by the repeated and abusive use of atropine or other deadly nightshade preparations; a form of dependency or structurally altered tolerance of cholinergic receptors toward the effects of this toxic alkaloid. This phenomenon causes severe functional changes in the autonomic nervous system, manifested through visual, cardiac, and behavioral disorders.
• Asbestos — A generic name given to a group of naturally occurring silicate minerals with a fibrous structure, remarkable for their absolute resistance to fire, acids, and mechanical tension, as well as for their thermal and electrical insulating properties. Intensively used in the past in the construction materials industry (asbestos-cement sheets, insulation), its modern use is strictly prohibited or severely restricted structurally from a medical standpoint, as the inhalation of microscopic fibers is highly toxic, causing asbestosis and severe lung diseases.
• Asbestos-cement — A composite, rigid, and durable construction material, historically manufactured from a structural mixture of hydraulic cement, water, and uniformly dispersed asbestos (amiantus) fibers, widely used in the past for producing corrugated roofing sheets, drainage pipes, and fireproof insulating panels. Although renowned for its increased durability and absolute resistance to harsh weather and fire, its modern production and use are completely banned or severely restricted by public safety laws, as material fragmentation or wear releases fine asbestos dust with a high carcinogenic potential.