#ab

• ab - A prefix or preposition of Latin origin widely used in medical, anatomical, and toxicological terminology to denote away from, separation, deviation from normal, or source/origin (e.g., abduction, chromosomal aberration).
• ab absurdo - A Latin phrase meaning 'from the absurd'. It is used in medical logic, bioethics, and forensic expert reports to prove a clinical truth or a cause of death by demonstrating that any alternative hypothesis would lead to an impossible or contradictory conclusion.
• ab abusu ad usum non valet consequentia - A fundamental principle in bioethics, pharmacovigilance, and clinical toxicology stating that 'a conclusion from the abuse of a thing to its use is not valid'. In medicine, it means that the prohibition or condemnation of a useful drug or medical treatment (e.g., opioids for severe pain) is not justified simply because some patients or individuals abuse it.
• Ab antiguo - An old graphical or medical variant for 'ab antiquo', meaning 'from ancient times' or 'since antiquity'. In a medical context, bioethics, and clinical deontology, it is used to refer to treatment principles, ethical rules (such as the Hippocratic Oath), or therapeutic practices that have been established and recognized as valid since ancient times.
• ab antique - A medieval graphical or alternative variant for the phrase 'ab antiquo', meaning 'since antiquity'. In clinical medical language and bioethics, it refers to customs, ancestral deontological standards, or patient-care principles passed down through generations, whose moral authority is recognized due to their age.
• ab antiquo - The classical and correct Latin form for 'from ancient times' or 'since antiquity'. In toxicology, pharmacognosy, and medical ethics, it is used to emphasize that certain therapeutic effects, prohibitions (e.g., using poisons for political or medical purposes), or professional oaths have been in force and respected since the earliest times of human civilization.
• Ab hoc et ab hac - A Latin phrase literally translated as 'from this one and from that one' or 'about this and about that'. In clinical psychology, neurology, and psychiatry, it describes a chaotic, incoherent speech with no logical connection between ideas, typical of patients experiencing delirium episodes, dementia, acute mental confusion, or severe intoxication with psychoactive substances.
• ab initio - A Latin phrase meaning 'from the beginning' or 'from first principles'. In biochemistry and computational pharmacology, it refers to calculations or simulations based strictly on the laws of quantum mechanics, without relying on preexisting empirical data (e.g., ab initio protein folding). In forensic medicine, it describes an act, toxic exposure, or pathological condition present from the very start.
• ab intestat - A phrase of Latin origin used in forensic medicine and psychiatric expert reports meaning 'without a will'. It refers to the succession or inheritance left by a person who died without leaving a valid will. In a clinical context, forensic boards often analyze ab intestat succession cases to evaluate whether the deceased suffered from dementia or other neuropsychiatric conditions that prevented them from executing a testament during their lifetime.
• ab intestato - The complete legal and forensic Latin form for 'ab intestat', meaning 'coming from a person who died without a testament'. In post-mortem psychiatric expert evaluations, the term is central to analyzing the mental capacity and competence of individuals with neurodegenerative diseases (such as vascular dementia or Alzheimer's) to validate the legal distribution of property.
• Ab irato - A Latin phrase translated as 'by an angry person' or 'under the impulse of rage'. In psychopathology, clinical psychology, and forensic psychiatry, it describes acts, statements, or assaults committed during an intense affective state, where extreme rage temporarily narrows the field of consciousness and reduces the patient's capacity to control impulses or evaluate consequences.
• Ab love principium - A Latin aphorism adapted in medical methodology and epidemiology meaning 'let us begin with the most important thing' (literally: 'the beginning from Jove/Jupiter'). In clinical diagnosis, toxicology, and epidemiological tracing, the maxim dictates starting the evaluation with the most probable hypothesis, the most dangerous toxin, or the most critically affected vital organ to optimize intervention time and save the patient's life.
• ab origine - A Latin phrase meaning 'from the origin' or 'from the very beginning'. In medical genetics and embryology, it is used to describe a chromosomal anomaly, congenital malformation, or metabolic disorder present in the organism's biological framework since the moment of conception (ab origine), as opposed to conditions acquired later in life.
• ab ovo - A Latin phrase derived from Horace's writings, meaning literally 'from the egg'. In embryology and developmental toxicology, it refers to analyzing a biological process, cellular mechanism, or the action of a teratogenic agent (malformation-inducing toxin) traced right from the egg-cell (zygote) stage or from the moment of fertilization to fully map fetal development disruptions.
• ab ovo usque ad mala - A Latin phrase from Horace's Satires, literally meaning 'from the egg to the apples' (referring to the traditional course of a Roman banquet). In academic, medical, and psychological contexts, it is used metaphorically to describe an exhaustive, comprehensive, and chronological analysis of a phenomenon, pathology, or individual development, covering the entire spectrum from the absolute origin to the final phase of manifestation.
• ab uno disce omnes - A Latin phrase from Virgil's Aeneid, literally meaning 'from one learn all'. In clinical and epidemiological contexts, it is used to describe a typical case or a representative sample within a population, suggesting that the detailed analysis of a single characteristic subject allows for the understanding of the general manifestations of an entire pathology or epidemic.
• ab urbe condita - A Latin phrase meaning literally 'from the founding of the city' (referring to the foundation of Rome in 753 BC). In academic contexts and the history of medical sciences, it is used metaphorically to date or describe an event, institution, or school of thought analyzed right from the official moment of its establishment or fundamental structuring.
• aba - A thick, coarse woolen fabric, usually white or gray, processed in a fulling mill. In Balkan ethnomedicine and history of hygiene, this material was historically used for weather-resistant peasant clothing and as an elementary thermal insulator in traditional rural treatments (dry wraps to combat chills or rheumatism).
• abac - An ancient manual computing device consisting of a frame with rods along which beads slide. In modern medicine, neuropsychology, and occupational therapy, the abacus is utilized as a tactile therapeutic tool for the cognitive rehabilitation of stroke survivors, traumatic brain injury patients, or early-stage dementia patients, aiding in the recovery of fine motor skills and mathematical executive functions.
• abaca - A textile plant of the banana family (Musa textilis), cultivated in the Philippines, whose leaves yield a highly durable vegetable fiber (Manila hemp). In the field of medical and pharmaceutical materials, fine abaca fibers are utilized in moisture-resistant filtration layers, for manufacturing sterile medicinal tea bags, special laboratory filter papers, and certain biodegradable protective textiles.