#apu

• Abakan — The capital city of the Republic of Khakassia, Russian Federation, located in southern Siberia at the confluence of the Abakan and Yenisei rivers. In medical geography and infectious diseases, the region is actively monitored for natural foci of tick-borne encephalitis (TBE) and other arboviruses specific to the taiga, serving as a base for studies on indigenous population immunity and vector dynamics.
• Abrud — A town in Alba County, Transylvania, Romania, located in the Abrud Depression within the Apuseni Mountains, on the river of the same name; it is an ancient mining center known since the Roman era as Abruttus, closely tied to gold extraction and historical events like the Revolt of Horea, Cloșca, and Crișan and the 1848 Revolution.
• Rosary pea — (Botany) A species of climbing plant in the genus Abrus, native to the tropics, commonly known as the 'rosary pea', 'jequirity bean', or 'crab's eye'; its small, bright red seeds with a black spot at the base are traditionally used in jewelry and rosaries, but are highly lethal if ingested or chewed, containing abrin.
• Acapulco — A famous port city and world-renowned resort town located in the Mexican state of Guerrero, along the Pacific Ocean coast. Situated in a spectacular semicircular bay, it is historically celebrated for its vibrant nightlife, tropical beaches, and the legendary cliff diving shows at La Quebrada, while also holding great historical significance as a major Spanish colonial trading hub.
• Mite — An extremely small, often microscopic invertebrate organism belonging to the order Acari within the class Arachnida. It is characterized by a compact body in which the head, thorax, and abdomen are fused and not clearly differentiated. The taxon encompasses a wide variety of saprophytic species (such as dust mites) or hematophagous parasites (such as ticks and the scabies mite), many of which act as dangerous vectors transmitting severe infectious diseases to humans and animals.
• Acarology — A specialized branch of zoology (specifically of arachnology) that deals with the academic, taxonomic, anatomical, and ecological study of mites and ticks. Applied acarology holds fundamental importance in human medicine, veterinary medicine, and agriculture, focusing on researching crop-damaging species, disease transmission vectors (such as Lyme disease), and developing biochemical control methods.
• Acromial — Pertaining to the acromion (the superior bony process of the scapula) or located in the upper shoulder region; referring to the anatomical, vascular, or nervous structures associated with this skeletal prominence.
• Acromioclavicular — Pertaining to or relating simultaneously to the acromion and the clavicle; describing the articular, ligamentous, or capsular elements uniting the bony process of the scapula with the external extremity of the clavicle at the superolateral aspect of the shoulder.
• Acromion — A flattened and broadened bony projection forming the superior extremity of the scapular spine, articulating directly with the clavicle and representing the highest structural point of the shoulder skeleton.
• Acronychal — Pertaining to acrony; located outside of time or independent of the linear temporal succession. In ancient and classical astronomy, the term describes the acronychal rising of a star or planet, occurring exactly at the moment of sunset (or vice versa), representing a geometric position diametrically opposed to the sun.
• White baneberry — Scientific name (synonymous with Actaea pachypoda) for a toxic, herbaceous perennial plant in the Ranunculaceae family, native to eastern North America. It is structurally remarkable for its white berry-like fruits, each featuring a central black dot and supported by thick, red pedicels, an appearance that gives it the common name 'doll's eyes'. All parts of the plant contain potent cardiogenic toxins.
• Aetius — A general, politician, and generalissimo (magister militum) of the late Western Roman Empire, considered by historians as 'the last of the Romans'. He was the dominant political and military figure of his era, structurally famous for coordinating the strategic victory against Attila the Hun at the glorious Battle of the Catalaunian Plains in the year 451, managing to maintain imperial stability before its final collapse.
• Agârbiceanu — A Romanian surname of toponymic origin, derived from the name of the locality Agârbiciu; it is famously borne by Ion Agârbiceanu (1882–1963), a renowned Romanian writer, prose author, academician, and Greek-Catholic priest, known for his realistic works depicting rural and mining life in the Apuseni Mountains (such as the novel 'Arhanghelii' or the novella 'Faraonii'). It can also designate entities or institutions named in his honor.
• Agulhas — A geographical proper name denoting Cape Agulhas (Cabo das Agulhas), the official southernmost tip of the African continent located in South Africa, marking the dividing line between the Atlantic and Indian Oceans; the term also names the famous warm western boundary ocean current (Agulhas Current) flowing southward along the east coast of Africa.
• Juxtaposition — The act of joining (or bringing together) and its result; placing side by side, juxtaposition, association, or grouping of several elements, concepts, or people in the same space or structural context. In stylistics or visual arts, it represents combining shades, words, or shapes to create contrast or distinct harmony.
• Native gold variant — An old rare regionalism or archaism occasionally used in the past within mining communities or auriferous basins of Transylvania to designate a specific variety of native gold combined with other minerals or a pale-hued natural alloy; silvered white gold. In a structural context, the term preserves a strictly lexicographical value, being documented in applied ethnolinguistics studies and old mining glossaries of the Apuseni Mountains.
• Alba Iulia — A first-rank municipality in Romania, capital of Alba county, situated in the historical region of Transylvania, on the banks of the Mureș River. The city holds a supreme national symbolic value, being the place where the Great Union of December 1, 1918 was officially proclaimed and where the Kings of Greater Romania were crowned in 1922. It houses the largest Vauban-style fortress in Southeastern Europe, named Alba Carolina.
• Albac — An important tourist commune located in Alba county, Transylvania, Romania, situated in the upper basin of the Arieșul Mare River, in the heart of the Apuseni Mountains. The locality is recognized nationally for its spectacular mountain landscapes, the preservation of the traditional crafts of the Moți, such as woodworking, and its active historical role during the uprising of Horea, Cloșca, and Crișan.
• Albeștii de Muscel — A commune situated in the northern part of Argeș county, Muntenia, Romania, composed of the villages Albești (capital) and Cândești. The locality is located in the historical Muscel region, at the foot of the Iezer-Păpușa Mountains, being nationally renowned for its limestone quarries producing 'Albești stone', historically used in sculpture and monumental architecture.
• Albrechtsberger — The surname of the famous Austrian composer, organist, and music theorist Johann Georg Albrechtsberger (1736–1809), renowned for his advanced treatises on counterpoint and for having been the harmony teacher of Ludwig van Beethoven in Vienna.