#welding

• Acrosincarpy — A structural condition or plant morphological anomaly characterized by the fusion, welding, or partial joining of individual carpels or fruits exclusively at their upper (apical) extremities, while the lower portions or bases remain distinct and separate during development.
• Aluminothermy — A metallurgical process based on the reduction of metal oxides using aluminum in the form of fine powder or granules, a highly exothermic reaction that releases a massive amount of heat and temperatures exceeding two thousand degrees, heavily used for welding railway tracks or obtaining pure metals.
• Anti-actinic — Protecting the eyes or biological tissues against the harmful and aggressive action of strong sunlight or the blinding glare produced by electric welding arcs; an optical filter or structurally shielding substance that absorbs damaging ultraviolet and infrared radiation. In an industrial sense, it describes the material used to manufacture protective glasses or visors for metallurgists and welders.
• Argon — A chemical element with atomic number 18 and symbol Ar, representing a noble gas that is colorless, odorless, and tasteless, constituting approximately 0.93% of the Earth's atmosphere. In a structural sense, argon has a fully populated and stable outer electron shell (octet), giving it remarkable chemical inertness; it is widely used in industry as a protective atmosphere for gas tungsten arc welding, electronics manufacturing, and incandescent light bulb filling.
• Autogenous — Produced, generated, or developed from within itself, without the intervention of an external agent; self-generating. In metallurgy and engineering, it designates an industrial process of welding or cutting metals via localized melting with an oxyacetylene flame, often used as a noun ('autogenous apparatus'). In psychology, it defines neuromuscular relaxation techniques guided internally.
• Self-welding — The act of self-welding and its result; an autonomous physical, chemical, or metallurgical process through which two identical or compatible metallic or polymeric surfaces join tightly, achieving a continuous structural bond under the action of heat, high pressure, or internal molecular reactions without the addition of external filler material or manual welding intervention.