#format

• To abort — To prematurely, spontaneously, or deliberately terminate the development of a pregnancy (miscarriage or abortion); (in computer science and technology, by modern extension) to forcibly stop the execution of a program, a script, or a technical operation before its complete finalization; (figurative, literary sense) to fail in achieving a plan, a project, or an action during its incipient phases.
• To form an abscess / To abscess — A pathological process where a localized acute purulent inflammation or bacterial infection evolves into a distinct abscess, accumulating pus and causing necrosis of the surrounding tissues.
• Abscessation / Abscess formation — The pathological process of abscess formation; the transformation of an acute inflammation or diffuse inflammatory infiltrate (such as cellulitis or phlegmon) into a well-circumscribed purulent collection, accompanied by liquefactive tissue necrosis.
• Abscessation / Process of abscessing — The action or process of forming an abscess; the nominalized form describing the transition of an inflammatory cell infiltrate into a circumscribed purulent collection.
• Abdomeno- — A lexical combining form (prefixoid) derived from Latin and Greek, used in medical semiology, surgery, and neuropsychiatry to form compound terms referring to the abdomen or abdominal structures. In clinical language, it serves as a morphological anchor for structural descriptors, neuro-somatic diagnostic procedures, or surgical techniques applied to patients with somatopsychically correlated disorders.
• Abdomin- — A linguistic variant of the combining form 'abdomeno-', used as a lexical word-forming element in international medical and neuropsychiatric terminology. It attaches directly to roots beginning with a vowel to denote structures, disorders, reflex reactions, or investigative techniques correlated with the abdominal region and its somatopsychic manifestations.
• Abdomeno- — A lexical combining form (prefixoid) derived from Latin and Greek, used in medical semiology, surgery, and neuropsychiatry to form compound terms referring to the abdomen or abdominal structures. In clinical language, it serves as a morphological anchor for structural descriptors, neuro-somatic diagnostic procedures, or surgical techniques applied to patients with somatopsychically correlated disorders.
• Abdul-Medjid delusion — A clinical eponym drawn from Ottoman imperial onomastics (Sultan Abdul-Medjid I), rarely used in the terminology of 19th-century Romanian and European asylums. It denoted a particular manifestation of melancholic delusion or exhaustion psychosis, characterized by ideas of unrealistic universal reform mixed with profound apathy, morbid sadness, and feelings of helplessness before destiny, with the patient considering himself a misunderstood or dethroned monarch.
• Abort — An emergency command, action, or procedure used in computer science, programming, and aerospace technology to forcibly and immediately terminate a process, code execution, software application, or operational mission before its natural completion; (in medicine, literary) a rare term borrowed from English or Latin used as a synonym for abortion or the premature halt of an embryo's development or a pathological process.
• Aborting — The act of aborting or prematurely terminating a process; the spontaneous or induced termination of a pregnancy (medical term used as a modern synonym for abortion); (in computer science and technology) the process of forcibly and immediately stopping the execution of a program, a script, a data transaction, or an operational mission before scheduled completion; (figurative sense) the early failure of a plan or project.
• Abrachia — An extremely rare congenital malformation characterized by the complete absence or rudimentary development of the arms (upper limbs) in a fetus or developing organism; a severe anatomical anomaly within the category of limb agenesis, similar to or closely related to amelia and congenital abrachia.
• Abrachiocephalus — A teratological monster, fetus, or organism with severe congenital malformations, characterized by the simultaneous absence of both arms and the head, or by the abnormal and rudimentary fusion of cephalic structures in the complete absence of upper limbs; (adjectival) presenting the anatomical features of this embryonic developmental anomaly.
• Abrachiocephaly — A complex and extremely severe congenital malformation characterized by the simultaneous absence of both the head (acephalia) and both upper limbs (abrachia) in a fetus or developing organism; an early embryonic developmental anomaly, incompatible with life, studied within classical and experimental teratology.
• Abstraction — The mental operation or process through which the essential is separated from the non-essential, extracting the general and common features of a class of objects while ignoring their particular, concrete, or accidental traits. In computer science, it denotes the technique of hiding complex implementation details behind a simple interface, facilitating software development.
• Double-talk — In a literal and technical sense, a light, fine, and fleeting condensation of water vapor on a glossy surface. Figuratively, colloquially, and in slang, the term denotes a deliberate act of misleading, verbal manipulation, or deception through long, confusing speeches or plausible lies. It is frequently used to describe insincere behavior or a rhetorical stratagem aimed at hiding the truth or avoiding responsibility through superficial arguments.
• Abwehr — The military intelligence and counterintelligence service of the German armed forces (Reichswehr and later Wehrmacht), operating under the High Command between 1920 and 1944. Initially created with a strictly defensive role to bypass the restrictions of the Treaty of Versailles, the service expanded under Admiral Wilhelm Canaris into a complex network of foreign espionage and sabotage, while also serving as a hidden core of internal resistance against the Nazi regime until its dissolution by Hitler.
• Acardiac — Lacking a heart, or possessing a rudimentary, completely non-functional heart. In neonatology and fetal medicine, the term describes an 'acardiac fetus' (or acardiac twin), an extremely rare congenital anomaly occurring exclusively in monochorionic twin pregnancies due to Twin Reversed Arterial Perfusion (TRAP sequence). In this condition, the malformed fetus survives in utero only because it receives blood pumped by the heart of its healthy co-twin (the pump twin).
• Acardia — A congenital absence of the heart or a complete cessation in the ontogenetic development of the cardiac structure in a fetus. This severe structural anomaly is incompatible with independent extrauterine life and is documented almost exclusively within monochorionic multiple pregnancies with asymmetric development (TRAP sequence), where the affected fetus's blood circulation is maintained solely by its twin's heart through placental vascular anastomoses.
• Acrodolichomelia — A rare congenital structural malformation or anatomical feature characterized by disproportionate and excessive length of the distal segments of the limbs (hands and feet relative to arms and thighs, or unusually long digits).
• Acrodolichomelia — A spelling variant or medical transcription error for acrodolichomelia, describing a rare congenital structural malformation characterized by disproportionate and excessive length of the distal segments of the limbs.